Baseball in 1851
June
| June 3 | The Knickerbockers win their first match of the year 21-11 against the Washington Club. According to Cartwright’s rules‚ the first team to score 21 runs wins the game. The match is played at the Red House Grounds in Harlem‚ at what is now 106th Street and Second Avenue. |
July
| July 17 | The Knicks win another game from the Washington club‚ 22-20‚ at the Red House Grounds. |
