Jack Berly debuted on April 22, 1924 and played his final game on September 24, 1933.
Jack Chapman debuted on May 5, 1874 and played his final game on August 8, 1876.
Jack Cullen debuted on September 9, 1962 and played his final game on May 5, 1966.
Jack Damaska debuted on July 3, 1963 and played his final game on July 20, 1963.
Jack Egbert debuted on April 21, 2009 and played his final game on May 28, 2012.
Jack Enzenroth debuted on May 1, 1914 and played his final game on September 22, 1915.
Jack Enzenroth played in 3 games at catcher for the St. Louis Browns in 1914, starting in none of them. He made 10 putouts, had 2 assists, and committed one error, equivalent to .333 errors per game (estimate based on total games played in). He had one double play. He had 1 passed ball, 0 wild pitches, 0 opponent stolen bases, and 0 opponent caught stealings.
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.
Jack Bellman debuted on April 23, 1889 and played his final game on April 23, 1889.