The Interior — Social Studies · Sports HistoryGrades 3–5

Unit 4 · How a Diamond Got Lines

Start with the story. Then go through each chapter, one lesson at a time. Each lesson has three short checks. Each chapter ends with a review. The unit ends with a wrap-up.

← Sports History, the whole course

4Unit

How a Diamond Got Lines

Origins

People hit balls with sticks and ran between marks for hundreds of years. In England, children played rounders and stoolball. In American towns, people played town ball. Each place had its own bases, its own distances and its own way to make an out.

In the 1840s and 1850s, clubs in New York wrote their rules down. They set the bases ninety feet apart and a game at nine innings. Writers like Henry Chadwick printed box scores and guides. Leagues, umpires and scorers kept the game the same from town to town.

In this unit you will read old rules, a town law, a legend and a rule book. You will be able to explain how baseball got its measured field. You will also explain how scorebooks let strangers compare games.

When it happened
1744

A Little Pretty Pocket-Book, printed in London, has a page titled Base-Ball

1791

Pittsfield, Massachusetts, bans baseball near its new meeting house

1845

The Knickerbocker Base Ball Club of New York writes its rules

1857

A New York convention sets bases ninety feet apart and games at nine innings

1860

Beadle's Dime Base-Ball Player, edited by Henry Chadwick, is first printed

1869

The Cincinnati Red Stockings become the first openly all-professional team

1876

The National League is founded; Chicago wins its first pennant

1893

The pitching distance is set at 60 feet 6 inches

1900

The IHSA is founded, and home plate becomes a five-sided plate

1907

The Mills Commission reports the Doubleday legend

1939

The National Baseball Hall of Fame opens in Cooperstown

1940

Belleville wins the first Illinois state baseball tournament

Chapter

From a Lot to a Diamond

Baseball
Big questionHow did many loose bat-and-ball games become one baseball with a measured field?
The story

Jackets on the Grass

Kids use jackets for bases, then walk past a field with white lines and a measured square.

It is a warm evening at a city park. Five kids want to play ball. They have one bat and one scuffed ball. They have no bases, so they drop their jackets on the grass. A red jacket is first base. A backpack is home.

The jackets land wherever someone tosses them. First base is close. Second base is far away by the fence. Nobody measured anything. The kids argue about whether a runner was safe. Each kid remembers the bases a little differently.

On the walk home, they pass the high school field. White chalk lines run out from home plate. Four white bases sit at the corners of a square. A sign on the dugout lists the school team's schedule against other towns.

The kids at the park made a game for one evening. The school field holds a game that strangers can share. Every base on that field sits ninety feet from the next one. Clubs in New York first agreed on that distance in the 1850s.

Talk about itWhat changes when the bases are measured instead of tossed on the grass?
Section 1

Games Before Baseball

7.1

Rounders and Town Ball

Main ideaPeople in England and America played many bat-and-ball games long before baseball had written rules.

In England in the 1700s, children played bat-and-ball games with many names. One was . A player hit a ball and ran around a loop of posts or stones. Another old game was stoolball, played with a stool as the target.

In 1744, a London printer named John Newbery sold a children’s book called A Little Pretty Pocket-Book. It has a short rhyme and a small picture titled Base-Ball. This is one of the oldest printed uses of the word.

English settlers brought these games to North America. By the early 1800s, people in American cities played a game called . The number of players, the bases and the ways to make an out changed from town to town.

Words to know
rounders
an old English bat-and-ball game in which a hitter runs around a loop of posts
town ball
a bat-and-ball game played in American towns in the early 1800s, with rules that varied by place
Check yourself

1. What is rounders?

2. Which 1744 book has a page titled Base-Ball?

3. Why was town ball hard to play with a new team?

7.2

A Ban Near a Meeting House

Main ideaA 1791 town law from Pittsfield, Massachusetts, shows people were already playing baseball there.

In 1791, the town of Pittsfield, Massachusetts, passed a . A bylaw is a rule made by a town. It banned games of baseball and some other ball games within 80 yards of the new meeting house.

The town wanted to protect the windows of its meeting house. Broken glass was expensive. A town does not ban a game that nobody plays. So the bylaw tells historians that baseball was common enough to cause trouble.

Historians found this record in 2004 in old town papers. It is one of the oldest written uses of the word baseball in the United States. It shows the game grew slowly from many places, not from one inventor.

Words to know
bylaw
a rule made by a town or a club for its own members or land
record
a written paper kept from the past that historians can study
Check yourself

1. What is a bylaw?

2. What did Pittsfield want to protect in 1791?

3. Why does the Pittsfield ban matter to historians?

7.3

The Cooperstown Legend

Main ideaThe story that Abner Doubleday invented baseball in 1839 is a legend; no evidence supports it.

In 1905, a group called the Mills Commission began studying where baseball came from. Albert Spalding, a sporting goods maker, pushed for it. He wanted to show that baseball was an American game, not an English one.

In 1907, the commission reported that Abner Doubleday invented baseball in Cooperstown, New York, in 1839. Its main proof was a letter from one old man, Abner Graves. Doubleday himself never wrote that he made up the game.

Historians call this story a . In 1839 Doubleday was a cadet at West Point, far from Cooperstown. Still, the legend is why the National Baseball Hall of Fame opened in Cooperstown in 1939.

Words to know
legend
a story told as history that cannot be proven and may not be true
commission
a group chosen to study a question and report on it
evidence
records or objects that show something really happened
Check yourself

1. Which group named Doubleday as baseball's inventor in 1907?

2. Why do historians doubt the Doubleday story?

3. What opened in Cooperstown in 1939 because of the legend?

Section 2

The Rules Get Written

7.4

The Knickerbocker Club

Main ideaIn 1845 the Knickerbocker Base Ball Club of New York wrote down a short set of rules.

In 1845, a group of young men in New York City formed the Knickerbocker Base Ball Club. Many were clerks and shopkeepers. They met to play in the afternoons. That year they wrote a list of twenty rules.

Alexander Cartwright was a member, and his name is often tied to those rules. Historians still argue about how much he wrote. Several members worked on the club’s game together.

The Knickerbockers played at the in Hoboken, New Jersey. It was a park across the river from New York. Open city land was scarce, so clubs rode a ferry to reach a big, flat field.

Words to know
club
a group of members who meet, pay dues and follow their own rules
Elysian Fields
a park in Hoboken, New Jersey, where the Knickerbockers and other early clubs played
Check yourself

1. In what year did the Knickerbocker club write its rules?

2. Where did the Knickerbockers play?

3. What do historians still argue about?

7.5

Paces on the Ground

Main ideaThe 1845 rules measured the bases in paces, which are steps, not in feet.

The Knickerbocker rules said the bases would be 42 from home to second base. They also said 42 paces from first base to third base. A pace is a long walking step.

A pace is not an exact size. A tall person’s step is longer than a short person’s step. So historians are not sure how far apart the 1845 bases really were. Their guesses differ by many feet.

The rules also set a line idea. A ball hit outside the lines from home through first and third was foul. The rules also said a fielder could not throw the ball at a runner to get an out, which older games had allowed.

Words to know
pace
a long walking step, once used to measure distance
foul
a hit ball that lands outside the lines of the field
Check yourself

1. What is a pace?

2. Why is a pace a weak way to measure a field?

3. Which older practice did the 1845 rules stop?

7.6

Ninety Feet

Main ideaIn 1857 New York clubs agreed on thirty yards, or ninety feet, between bases.

By the 1850s, many clubs in and near New York played the Knickerbocker game. In 1857, clubs from the New York area met in a to agree on one set of rules. A convention is a meeting of groups who vote together.

The 1857 rules set the bases thirty yards apart. Thirty yards is ninety feet. The same meeting said a game would last nine innings. Before that, the first team to score 21 runs won.

In 1858, the clubs formed the National Association of Base Ball Players. It was the first group to govern many baseball clubs. Ninety feet between bases is still the rule for high school, college and major league baseball.

Words to know
convention
a meeting where clubs or groups vote on shared rules
yard
a unit of length equal to three feet
inning
a part of a baseball game in which each team gets a turn to bat
Check yourself

1. How far apart are the bases under the 1857 rules?

2. How did a game end before the 1857 rules set nine innings?

3. What group did clubs form in 1858?

Section 3

The Diamond Travels

7.7

Paid Players in Cincinnati

Main ideaIn 1869 the Cincinnati Red Stockings became the first openly all-professional baseball team.

At first, baseball clubs were . Players did not get paid to play. By the 1860s, some clubs quietly paid good players with jobs or cash. The rules of the national association did not allow it.

In 1869, the Cincinnati Red Stockings paid every player openly. Harry Wright ran the team. His brother George Wright played shortstop. They were the first openly all- baseball team.

The Red Stockings rode trains to play clubs in many cities, from the East Coast to California. They did not lose a game that season. Crowds everywhere saw the same field shape and rules.

Words to know
amateur
a player who plays without being paid
professional
a player who is paid to play as a job
Check yourself

1. What made the 1869 Red Stockings different?

2. Who ran the 1869 Red Stockings?

3. What is an amateur?

7.8

A League in 1876

Main ideaThe National League, founded in 1876, set one schedule and one rule book for its clubs.

In 1876, club owners formed the National League of Professional Base Ball Clubs. William Hulbert, who ran the Chicago club, led the plan. Eight cities had teams in the first season.

A is a group of teams that agree to one schedule and one set of rules. The owners, not the players, controlled this league. They banned betting and drinking at games to make the sport look respectable.

The Chicago White Stockings won the first National League in 1876. A pennant is the flag and title for a league champion. That Chicago club later became the team known today as the Chicago Cubs.

Words to know
league
a group of teams that play one schedule under one set of rules
pennant
a flag and title given to a league's champion team
Check yourself

1. When was the National League founded?

2. Which team won the first National League pennant?

3. Who controlled the new National League?

7.9

The Pitcher Moves Back

Main ideaLeagues moved the pitching distance from 45 feet to 50 feet in 1881 and to 60 feet 6 inches in 1893.

Early rules put the pitcher 45 feet from home plate. Pitchers threw harder over the years. Batters had less and less time to see the ball, and scores dropped.

In 1881, the National League moved the pitcher back to 50 feet. From 1881 to 1892, pitchers threw from inside a marked pitcher's box. Leagues kept changing the rules to balance the game.

In 1893, the league set the distance at 60 feet 6 inches. The box was replaced by a rubber slab called the pitcher's plate. Batting improved right away. That distance is still the major league rule today.

Words to know
pitcher's box
a marked area pitchers threw from before 1893
pitcher's plate
the rubber slab that marks the pitching distance, used since 1893
Check yourself

1. What was the pitching distance from 1881 to 1892?

2. When did 60 feet 6 inches become the rule?

3. Why did leagues move the pitcher back?

7.10

Home Plate Gets Its Shape

Main ideaIn 1900 home plate became a five-sided slab 17 inches wide.

Early home bases were often round or square. Some were iron or stone. By the 1870s, rules called for a square slab of white marble or stone. Its corner pointed toward the pitcher.

In 1900, the National League made home plate a five-sided shape called a . It is 17 inches wide across the front edge. The wide edge faces the pitcher, which made it easier for umpires to see the plate.

Today the same plate is set in fields at every level, from a park league to a major league stadium. The Official Baseball Rules include a drawing of the plate with every measurement.

Words to know
home plate
the five-sided slab where a batter stands and runners score
pentagon
a flat shape with five sides
Check yourself

1. What shape did home plate become in 1900?

2. How wide is the front edge of home plate?

3. Where is a drawing of home plate with its measurements?

Section 4

Strangers Share a Field

7.11

Games in Army Camps

Main ideaSoldiers played baseball in camps during the Civil War and carried the game home.

The Civil War lasted from 1861 to 1865. Soldiers spent long weeks waiting in camps. Men from New York and other cities brought the New York rules with them. They marked out fields near their tents.

Soldiers from farms and small towns learned the game in camp. Some prisoners of war also played. When the war ended, many men went home and started clubs in their own towns.

After the war, the number of clubs in the national association grew fast. Clubs in new states wrote to ask for the rules. A printed rule book let a club far from New York line its field the same way.

Words to know
Civil War
the war in the United States from 1861 to 1865 between the Union and the Confederacy
rule book
a printed list of a game's rules that groups agree to follow
Check yourself

1. When was the Civil War?

2. How did the war help spread baseball?

3. Why did far-off clubs want a printed rule book?

7.12

One Field, Many Levels

Main ideaRule groups for children, schools and major leagues each publish field measurements.

Today, different groups write baseball rules for different players. Major League Baseball publishes the Official Baseball Rules. The , the National Federation of State High School Associations, writes rules for high school games.

Little League Baseball began in Williamsport, Pennsylvania, in 1939. Its fields for young players have bases 60 feet apart. The field is smaller, but it keeps the same diamond shape and the same order of bases.

Because each group prints its measurements, a visiting team knows what field it will find. A school team from Peoria and a team from Chicago can meet on a field lined to the same NFHS numbers.

Words to know
NFHS
National Federation of State High School Associations, which writes rules for many high school sports
Little League
a youth baseball organization founded in Williamsport, Pennsylvania, in 1939
Check yourself

1. What does NFHS stand for?

2. How far apart are bases on a Little League Majors field?

3. Where did Little League begin in 1939?

Chapter review

From a Lot to a Diamond

0 / 8

1. Which record from 1791 shows people played baseball in Massachusetts?

2. What is the Doubleday story?

3. How did the 1845 Knickerbocker rules measure the bases?

4. Which distance did the 1857 convention set between bases?

5. What was special about the 1869 Cincinnati Red Stockings?

6. What is a league?

7. Which order of pitching distances is correct?

8. What changed about home plate in 1900?

Chapter

A Scorebook and a Diamond Plan

Baseball
Big questionHow did writing games down help towns far apart play and compare the same baseball?
The story

A Pencil on the Page

A scorebook lies open beside a chalked diamond, and every out waits to be written.

A school bench sits behind the backstop. On it lies an open scorebook with a short yellow pencil. The page has a grid of small boxes. Each row holds a player's name. Each column holds an inning.

Out on the field, a worker walks a chalk cart down the line from home plate. The white line runs past first base toward the outfield fence. The diamond is measured to the rule book, ninety feet on every side.

A student volunteer picks up the pencil. After each batter, she writes a small mark in a box. By the end of the game, the page will hold every hit, every out and every run, inning by inning.

Tomorrow, the school will send the final score to the local newspaper. A reader in another town can compare it with her own team's games. A writer named Henry Chadwick helped make that kind of page common in the 1850s and 1860s.

Talk about itWhat can a stranger learn from a scorebook page if they never saw the game?
Section 1

Writing a Game Down

8.1

Henry Chadwick

Main ideaHenry Chadwick, an English-born writer in Brooklyn, made baseball records common in newspapers.

Henry Chadwick was born in England in 1824. He moved to Brooklyn, New York, as a boy. In England, people kept careful written scores of , a bat-and-ball game with wickets. Chadwick knew those score sheets well.

In the 1850s, Chadwick watched baseball games in New York and began writing about them for newspapers. He thought baseball needed records as careful as cricket’s. He wrote for papers such as the New York Clipper and the Brooklyn Eagle.

Chadwick wrote and edited baseball guides for about fifty years. He also sat on rules committees. In 1938, he was elected to the National Baseball Hall of Fame. His plaque honors his work on the rules and records of the game.

Words to know
cricket
an English bat-and-ball game with wickets, known for careful written scores
journalist
a person who writes news for newspapers or magazines
Check yourself

1. Where was Henry Chadwick born?

2. Which game's score sheets did Chadwick know well?

3. When was Chadwick elected to the Hall of Fame?

8.2

The Box Score

Main ideaA box score is a small table that lists what each player did in one game.

A is a small table printed after a game. Each row is one player. Each column counts something, such as runs, hits or outs. It is called a box because it fits in a small box of newspaper type.

Chadwick is credited with making the box score a regular part of baseball writing by the late 1850s. Before that, newspapers described games in a few sentences. A reader could not tell what each player had done.

A box score let a reader check every player’s part in the game. It also saved space in a crowded newspaper. Papers across the country copied the form, and box scores are still printed and posted online today.

Words to know
box score
a small table that shows each player's runs, hits and other numbers for one game
column
a line of boxes going down a table, each holding one kind of number
Check yourself

1. What is a box score?

2. Who is credited with making the box score common?

3. How did newspapers describe games before box scores?

8.3

Letters and Numbers

Main ideaScorekeepers use short letters and position numbers to write a game quickly.

A game moves fast, so scorekeepers use short marks. The letter K stands for a . Chadwick is often credited with choosing K, the last letter of struck. Other letters stand for hits, walks and errors.

Scorekeepers also give each fielding place a number. The pitcher is 1 and the catcher is 2. The first, second and third basemen are 3, 4 and 5. The shortstop is 6. The outfielders are 7, 8 and 9.

With these marks, one small box can hold what happened to one batter. A person who learns the marks can read a scorebook kept by a stranger in another town. The marks work like a shared shorthand.

Words to know
strikeout
an out made when a batter gets three strikes; scorekeepers mark it with K
shorthand
a set of short marks that stand for longer words
Check yourself

1. What does K mean in a scorebook?

2. What number stands for the catcher?

3. Why do scorekeepers use short marks?

Section 2

Comparing Towns

8.4

A Guide Anyone Could Buy

Main ideaPrinted guides, such as Beadle's Dime Base-Ball Player from 1860, spread the same rules and records.

In 1860, a New York publisher named Beadle printed a small book called Beadle’s Dime Base-Ball Player. It cost ten cents, which is a . Henry Chadwick edited it for many years.

Each year’s guide printed the latest rules of the national association. It also printed records from the season before. A club in a new town could buy one guide and learn the whole game.

Later, sporting goods makers printed guides too. Albert Spalding’s company printed an official guide for the National League starting in the late 1870s. Guides were one way a rule change reached every club at once.

Words to know
guide
a small printed book of rules and records for a sport
dime
a ten-cent coin; cheap guides were sold for one dime
Check yourself

1. When was Beadle's Dime Base-Ball Player first printed?

2. Who edited Beadle's guide for many years?

3. How did a guide help a new club?

8.5

The Umpire Decides

Main ideaSince the 1845 rules, an umpire has settled arguments during a baseball game.

The 1845 Knickerbocker rules named an . An umpire is a judge who watches the game and settles arguments. The rules said the umpire’s decision could not be appealed. That means no one could overrule it.

Early umpires were often a gentleman chosen from the crowd or from another club. They sat or stood off to the side. They were not paid. As games grew bigger and more serious, leagues began to hire umpires.

The National League hired and paid its own umpires by the late 1800s. A paid umpire did not belong to either team. Today, the Official Baseball Rules set out what umpires decide and how they are chosen for each game.

Words to know
umpire
a judge who watches a game and settles what happened under the rules
appeal
to ask someone with more power to change a decision
Check yourself

1. What is an umpire?

2. What did the 1845 rules say about the umpire's decision?

3. Why did leagues begin to hire paid umpires?

8.6

The Official Scorer

Main ideaThe official scorer keeps the record that counts and decides whether a play was a hit or an error.

Many people in a ballpark keep score for fun. Only one person keeps the record that counts. That person is the . The scorer sits in the press box, away from the field.

The umpire decides what happened on the field, such as safe or out. The official scorer decides how to write it down. For example, the scorer decides whether a batter reached base on a hit or on a fielder’s .

Rule 9 of the Official Baseball Rules describes the scorer’s job. The scorer’s record becomes part of each player’s season totals. That is how records from one city can be compared with records from another.

Words to know
official scorer
the one person who keeps a game's official record and rules on hits and errors
error
a fielder's mistake that lets a batter or runner move ahead
Check yourself

1. Where does the official scorer usually sit?

2. What does the official scorer decide?

3. Which rule in the Official Baseball Rules covers the official scorer?

Section 3

New Tools, Same Diamond

8.7

The Catcher's Mask

Main ideaThe catcher's mask appeared in the 1870s to protect the player closest to the batter.

In early baseball, catchers stood well back from the batter. As pitchers threw harder, catchers moved closer to home plate. Foul balls and pitches could hit them in the face. Broken noses and teeth were common.

In the 1870s, Fred Thayer, the captain of the Harvard University team, is usually credited with making an early catcher's mask. It was a wire cage with padding. He received a patent for a mask in 1878.

At first, some fans and players teased catchers who wore masks. Within a few years, masks were normal at every level. Later rules added chest protectors, shin guards and helmets for catchers.

Words to know
catcher's mask
a wire or metal cage worn over the catcher's face for protection
patent
a government paper that says an inventor owns an idea for a set time
Check yourself

1. When did the catcher's mask appear?

2. Who is usually credited with an early catcher's mask?

3. What is a patent?

8.8

Gloves Arrive

Main ideaEarly fielders used bare hands; leather gloves spread in the late 1870s and 1880s.

In the 1845 rules and for years after, fielders caught the ball with bare hands. Swollen and broken fingers were common. Some players thought using protection was a sign of weakness.

In the 1870s, a few players began wearing thin leather gloves. Albert Spalding, a famous pitcher and first baseman, wore a glove in 1877. Spalding also owned a sporting goods company that sold .

By the 1890s, almost every fielder wore a glove. The rules did not change the diamond for gloves. They added limits on glove size later, printed in the rule book like any other measurement.

Words to know
gloves
leather coverings worn by fielders to protect the hand
sporting goods
equipment made and sold for sports, such as balls, bats and gloves
Check yourself

1. How did fielders catch the ball in the 1845 era?

2. Which famous player wore a glove in 1877 and also sold them?

3. By when did almost every fielder wear a glove?

8.9

Illinois School Baseball

Main ideaIllinois held its first state baseball tournament in 1940, and the IHSA took it over in 1941.

The , the Illinois High School Association, was founded in 1900. It sets rules for school sports across Illinois. It decides who may play, when seasons run and how state tournaments work.

High school teams in Illinois played baseball long before a state title existed. They played nearby towns under shared rules. In 1940, Illinois held its first state baseball , and Belleville won it. The IHSA took charge of the tournament in 1941.

A state tournament depends on shared records. Each school reports its scores. Games are played on fields lined to the same high school rules. That lets a team from a small town meet a team from a big city on equal terms.

Words to know
IHSA
Illinois High School Association, the group that runs school sports in Illinois, founded in 1900
tournament
a set of games in which teams play to find one champion
Check yourself

1. What does IHSA stand for?

2. When was the IHSA founded?

3. In what year was the first Illinois state baseball tournament held?

Chapter review

A Scorebook and a Diamond Plan

0 / 8

1. Which writer made box scores a regular part of baseball writing?

2. What does a box score show?

3. Which scorebook number stands for the shortstop?

4. What did Beadle's Dime Base-Ball Player of 1860 contain?

5. How do the umpire and the official scorer differ?

6. Why did the catcher's mask appear in the 1870s?

7. Which statement about gloves is true?

8. What happened in Illinois in 1940?

Unit wrap-up

How a Diamond Got Lines

Twelve words, twelve meanings

0 / 12

Tap a word, then tap its meaning. A right pair locks in green.

Words
Meanings
Unit test

Fifteen questions across the unit

0 / 15

1. What does the 1744 book A Little Pretty Pocket-Book show?

2. Why did Pittsfield pass its 1791 bylaw?

3. What do historians say about the Doubleday story?

4. Which club wrote baseball rules in 1845?

5. Why were paces a problem for measuring bases?

6. What did the 1857 convention decide?

7. Which team was the first openly all-professional team?

8. Who led the founding of the National League in 1876?

9. What was the pitching distance from 1881 to 1892?

10. What is a box score?

11. Which game's scoring did Chadwick know before baseball?

12. What does the official scorer decide?

13. What did the 1845 rules say about the umpire?

14. Why did the catcher's mask appear in the 1870s?

15. In what year was the first Illinois state baseball tournament held?

Write it

Which mattered more for making one baseball that many towns could share: measuring the field, or writing down the score? Use two or three records from this unit, such as the 1845 Knickerbocker rules, the 1857 convention, Beadle's 1860 guide or the Official Baseball Rules.

  • Name each record and its year.
  • Say what the record changed for clubs in other towns.
  • Use unit words such as convention, box score and official scorer.
  • Call the Doubleday story a legend if you mention it.
  • End by saying which choice you think mattered more and why.
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Practice rooms

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For the teacher

Every lesson keeps its own three checks; a lesson is ticked when all three are right. Chapter reviews, the unit test and its spiral review (five questions from earlier units in this band) score on the page. When the site is connected to your sheet, or the link carries ?dest=, each one also has a Send box: the first-try score, the standards, the supports used, the attempt number and the minutes go to your sheet as an IEP data point.

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Fact-check notes for this course live in the handoff: quotes marked (paraphrased) were set that way on purpose.