Jack Pfiester debuted on September 8, 1903, playing for the Pittsburgh Pirates at Exposition Park; he played his final game on May 10, 1911, playing for the Chicago Cubs at West Side Park II.
Jack Pfiester played in 31 games at pitcher for the Chicago Cubs in 1906, starting in none of them. He made 21 putouts, had 62 assists, and committed 7 errors, equivalent to .226 errors per game (estimate based on total games played in). He had one double play.
Jack Pfiester played in 29 games at pitcher for the Chicago Cubs in 1909, starting in none of them. He made 6 putouts, had 69 assists, and committed 2 errors, equivalent to .069 errors per game (estimate based on total games played in). He had one double play.
Jack Pfiester played in 6 games at pitcher for the Chicago Cubs in 1911, starting in none of them. He made one putout, had 13 assists, and committed one error, equivalent to .167 errors per game (estimate based on total games played in). He had one double play.
Jack Aker debuted on May 3, 1964 and played his final game on September 27, 1974.
Jack Albright debuted on May 19, 1947 and played his final game on July 27, 1947.
Jack Allen debuted on May 1, 1879 and played his final game on July 17, 1879.
Jack Aragon debuted on August 13, 1941 and played his final game on August 13, 1941.
Jack Baker debuted on September 11, 1976 and played his final game on June 8, 1977.
Jack Baldschun debuted on April 28, 1961 and played his final game on August 21, 1970.
Jack Banta debuted on September 18, 1947 and played his final game on June 21, 1950.
Jack Barry debuted on July 13, 1908 and played his final game on June 23, 1919.
Jack Beach debuted on May 1, 1884 and played his final game on June 12, 1884.