John O'Rourke debuted on May 1, 1879, playing for the Boston Red Caps at South End Grounds I; he played his final game on September 10, 1883, playing for the New York Metropolitans at Polo Grounds I West Diamond.
Johnny Rucker debuted on April 16, 1940, playing for the New York Giants at Polo Grounds IV; he played his final game on September 29, 1946, playing for the New York Giants at Polo Grounds IV.
John Rocker debuted on May 5, 1998, playing for the Atlanta Braves at Turner Field; he played his final game on May 14, 2003, playing for the Tampa Bay Devil Rays at Tropicana Field.
John Burke debuted on June 27, 1902 and played his final game on July 15, 1902.
John Burkett debuted on September 15, 1987 and played his final game on September 26, 2003.
John Cassidy debuted on April 24, 1875 and played his final game on August 12, 1885.
John Cerutti debuted on September 1, 1985 and played his final game on October 5, 1991.
John Crowley debuted on May 1, 1884 and played his final game on September 10, 1884.
John kennedy aug. 1957,
John Ellis debuted on May 17, 1969 and played his final game on October 3, 1981.
John Dodge debuted on August 29, 1912 and played his final game on October 5, 1913.
John Baumgartner debuted on April 14, 1953 and played his final game on April 21, 1953.
John Burke debuted on June 27, 1902 and played his final game on July 15, 1902.
John Burkett debuted on September 15, 1987 and played his final game on September 26, 2003.
John Cassidy debuted on April 24, 1875 and played his final game on August 12, 1885.
John Cerutti debuted on September 1, 1985 and played his final game on October 5, 1991.
John Crowley debuted on May 1, 1884 and played his final game on September 10, 1884.
John Dagenhard debuted on September 28, 1943 and played his final game on October 3, 1943.
John Deasley debuted on June 17, 1884 and played his final game on September 8, 1884.
John Denny debuted on September 12, 1974 and played his final game on August 18, 1986.