Jack Keenan debuted on August 11, 1891, playing for the Cincinnati Kelly's Killers at East End Park; he played his final game on August 11, 1891, playing for the Cincinnati Kelly's Killers at East End Park.
NFL player Keenan Clayton played for Oklahoma.
NFL player Keenan Allen played for California.
NFL player Keenan Robinson played for Texas.
Jimmie Keenan debuted on September 9, 1920, playing for the Philadelphia Phillies at Baker Bowl; he played his final game on July 4, 1921, playing for the Philadelphia Phillies at Baker Bowl.
Jim Keenan debuted on May 17, 1875, playing for the New Haven Elm Citys at Hamilton Park; he played his final game on October 3, 1891, playing for the Cincinnati Reds at League Park I in Cincinnati.
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.