Baseball history timeline
A Little Pretty Pocket-Book, printed in London, mentions "base-ball".
A bylaw in Pittsfield, Massachusetts bans playing baseball near the new meeting house.
The Knickerbocker Base Ball Club writes down its rules in New York.
The first recorded game under Knickerbocker rules is played in Hoboken, New Jersey.
The Cincinnati Red Stockings become the first openly all-professional team.
The National League is founded.
The American League starts play as a major league.
The first World Series is played.
Rube Foster founds the Negro National League.
The All-American Girls Professional Baseball League begins. It runs until 1954.
Jackie Robinson breaks the color line with the Brooklyn Dodgers.
Each league splits into two divisions, and the League Championship Series begins.
The American League adopts the designated hitter.
A players strike cancels the World Series.
MLB recognizes the Negro Leagues of 1920-1948 as major leagues.
The designated hitter becomes universal.
The pitch clock arrives and game times drop by about 25 minutes.
Ask ten fans who invented baseball and you will hear at least three different names, and every one of them is only part of the answer. The honest version of the history of baseball is messier than a plaque in Cooperstown: a folk game played by English children, carried across the Atlantic, rewritten by clerks and doctors in 1840s New York, and then turned into a business by men who wanted to sell tickets. This page walks through that story in order, flags the parts historians still argue about, and ends with why any of it matters when you read a betting line today.
When was baseball invented?
The first place to look when you ask when was baseball invented is not America at all. The earliest known use of the word in print comes from London. In 1744 the publisher John Newbery issued A Little Pretty Pocket-Book, a book of rhymes for children, and one page is titled “Base-Ball.” The verse describes a boy striking the ball, running to “the next destin’d Post,” and then home. The woodcut shows players and posts but no bat. No copy of the 1744 printing survives, so the earliest page we can actually see comes from a later edition, and an American edition printed in Worcester, Massachusetts, in 1787 is held by the Library of Congress.
That game was closer to rounders than to anything played at Yankee Stadium. Rounders, stoolball and similar games shared the same basic idea: hit a ball, run around markers, get home before the fielders stop you. In many versions a fielder could put a runner out by throwing the ball at him, which is a good reason the rule did not last into the grown-up game.
So when was baseball invented? The fair answer is that a game called base-ball existed by the middle of the 18th century, and a game you would recognize did not exist until about a hundred years later. Everything in between in the history of baseball was local variation, and towns from Massachusetts to upstate New York played their own versions with their own names.
Who invented baseball? The Doubleday myth
By the early 1900s the question had turned into a patriotic argument. The sportswriter Henry Chadwick, who was born in England, said baseball descended from rounders. Albert Spalding, a former star pitcher turned sporting-goods magnate, wanted an American birth certificate. To settle it, a panel known as the Mills Commission was formed in 1905, and its report in 1907 named Abner Doubleday as the man who invented the game in Cooperstown, New York, in 1839.
The evidence was thin. It rested mainly on a letter from Abner Graves, who had been a boy in Cooperstown in 1839 and wrote about it nearly seventy years later. Doubleday himself was a cadet at West Point that year, went on to become a Union general, died in 1893, and never once claimed any connection to the sport. His friends, including the commission’s own chairman, A.G. Mills, could not remember him talking about baseball at all.
The story stuck anyway, and it is the reason the National Baseball Hall of Fame opened in Cooperstown in 1939. Doubleday is not in the Hall. Historians today treat the Mills report as a founding legend rather than history, and if someone tells you with confidence who invented baseball, the Doubleday version is the one you can safely rule out.
Cartwright, Doc Adams and the Knickerbocker rules (1845)
The real turning point came from a club of young New York men who played in Manhattan and later across the Hudson. The Knickerbocker Base Ball Club was organized on September 23, 1845, and a set of 20 rules followed that fall. They laid out foul territory, three strikes, and outs made by tagging or forcing a runner instead of hitting him with a thrown ball. That last change mattered more than it looks, because it meant the ball could get harder and travel farther.
Alexander Cartwright, a bank clerk and volunteer fireman, has long carried the credit. His Hall of Fame plaque calls him the “Father of Modern Base Ball.” That claim is now contested. Documents called the Laws of Base Ball, drafted in 1857 by Daniel “Doc” Adams while he was president of the Knickerbockers, set the distance between bases at 90 feet, fixed teams at nine players and made a game nine innings long, instead of the first side to score 21 runs. Cartwright had left New York for the West and Hawaii years earlier. The Hall of Fame has said its plaques reflect the best information at the time of induction and that the record can be revisited as the historical consensus changes.
One detail from the 1857 rules is worth a smile on a betting site: the convention also put limits on wagering by players and umpires. Money and baseball have been close companions from the start.
The first recorded game: Elysian Fields, Hoboken (1846)
On June 19, 1846, the Knickerbockers played a side called the New York Nine at the Elysian Fields in Hoboken, New Jersey, and lost 23-1. It is usually described as the first recorded game between two clubs under the new rules. It was not the first time Americans hit a ball and ran bases, but it is the first match we can point to with a date, a place and a score.
The “New York game” spread fast. By the late 1850s clubs in Brooklyn and Manhattan were drawing crowds, and after the Civil War, soldiers who had played in camps took the game home with them to every corner of the country.
Professionals take over, 1869 to 1876
For its first decades baseball was officially amateur, although many stars were quietly paid. The 1869 Cincinnati Red Stockings ended the pretense. Organized by club president Aaron Champion and managed by Harry Wright, with Harry’s brother George at shortstop, they were the first openly all-professional team. They went through 1869 without a loss and kept winning into 1870 before the Brooklyn Atlantics beat them. MLB treats 1869 as the birth of professional baseball and marked the 150th anniversary in 2019.
The first stable major league came seven years later. On February 2, 1876, William Hulbert of Chicago met club owners at the Grand Central Hotel in New York and founded the National League. His pitch was about business integrity: honored contracts, a fixed schedule, and a firm line against gambling and thrown games, which had damaged the earlier players’ association. That same concern would return in 1919 with the Black Sox scandal.
The American League and the first World Series (1901-1903)
Ban Johnson built the American League out of a minor circuit and declared it a major league in 1901. Two seasons of raiding each other’s players followed until the leagues made peace in 1903. That October the champions met in the first modern World Series. The Boston Americans beat the Pittsburgh Pirates five games to three in a best-of-nine series, with games played at the Huntington Avenue Grounds and Exposition Park.
From there the structure you know today stayed remarkably fixed for half a century: 16 teams, two leagues, one World Series, and most clubs packed into the Northeast and Midwest.
Integration: Jackie Robinson in 1947
On April 15, 1947, Jackie Robinson took the field at first base for the Brooklyn Dodgers at Ebbets Field against the Boston Braves. He was the first Black player in the major leagues since 1884, ending an unwritten agreement among owners that had kept the sport segregated for more than six decades. He went hitless that day and still scored the go-ahead run.
Robinson won the first Rookie of the Year award that season and the National League MVP in 1949. The Negro Leagues, where players such as Josh Gibson and Satchel Paige had built their careers, began to lose their stars to the majors. In 1997 MLB retired his number 42 for every team, the first number honored that way.
Going west and growing to 30 teams (1958-1998)
Air travel made a national league practical. After the 1957 season the Dodgers left Brooklyn for Los Angeles and the Giants left Manhattan for San Francisco, and the first West Coast game was played at Seals Stadium in San Francisco in April 1958. It broke hearts in New York, and it was the moment the sport stopped being a regional business.
Expansion followed. The American League added the Los Angeles Angels and a new Washington Senators club in 1961, and the National League added the New York Mets and the Houston Colt .45s, later the Astros, in 1962. More rounds of expansion came over the next decades, and the Arizona Diamondbacks and Tampa Bay Devil Rays brought the total to 30 clubs in 1998, where it still stands.
The modern era: free agency, data and the pitch clock
The last fifty years changed the business more than the rules. Free agency in the 1970s gave players control of their careers. The designated hitter arrived in the American League in 1973 and became universal in 2022. Statistics moved from the back of baseball cards to front offices, and teams now make lineup and bullpen decisions from pitch-tracking data measured in fractions of an inch.
The biggest recent change is on the field. In 2023 MLB added a pitch clock, bigger bases and limits on defensive shifts, and games got much shorter almost overnight. The postseason has grown too, with 12 teams qualifying since 2022. Our guide to MLB rule changes covers each of those shifts in detail, and how long a baseball game lasts shows what the clock did to the average game.
What the history of baseball means for betting today
The history of baseball is not a betting system, but it explains why the numbers behave the way they do. Scoring has always moved in eras. The dead-ball years before 1920, the high-scoring late 1990s and the strikeout-heavy 2010s all produced very different run totals, and each rule change since 2023 has nudged the environment again. That is the reason we compare today’s games against recent seasons rather than long-run averages when we look at over/under totals.
Some markets only make sense because of old rules. The nine-inning game from the 1857 laws is why a first 5 innings bet exists at all: it isolates the starting pitchers before the bullpens take over, and you can check who is starting on our probable pitchers page. The first inning, when each lineup’s top hitters are certain to bat, is the whole basis of the NRFI market. The run line of -1.5 and +1.5 grew out of a sport where one-run games are common, and our explainer on baseball betting lines shows how moneylines, run lines and totals fit together.
If you want to put any of this into numbers, the betting calculators convert American odds into break-even percentages so you can see what a price actually asks of you. Keep your stakes to a budget you set in advance; sports betting is for adults 21 and older, and if it stops being fun, 1-800-GAMBLER is a free, confidential call. You can find all our other guides from the homepage.
