Jeff Kaiser debuted on April 11, 1985, playing for the Oakland Athletics at Oakland Coliseum; he played his final game on May 17, 1993, playing for the New York Mets at Shea Stadium.
Jeff Barry debuted on June 9, 1995 and played his final game on October 3, 1999.
Jeff D'Amico debuted on June 28, 1996 and played his final game on May 10, 2004.
Al Kaiser debuted on April 18, 1911, playing for the Chicago Cubs at West Side Park II; he played his final game on August 30, 1914, playing for the Indianapolis Hoosiers at .
Jeff Dedmon debuted on September 2, 1983, playing for the Atlanta Braves at Atlanta-Fulton County Stadium; he played his final game on September 29, 1988, playing for the Cleveland Indians at Cleveland Stadium.
Jeff Bronkey debuted on May 2, 1993, playing for the Texas Rangers at Arlington Stadium; he played his final game on August 12, 1995, playing for the Milwaukee Brewers at County Stadium.
Jeff Kaiser played in 15 games at pitcher for the Oakland Athletics in 1985, starting in none of them. He played for a total of 50 outs, equivalent to 1.85 9-inning games. He made 4 putouts, had 3 assists, and committed no errors, equivalent to 0 errors per 9-inning game. He had one double play.
Jeff Abbott debuted on June 10, 1997 and played his final game on September 29, 2001.
Jeff Bailey debuted on July 6, 2007 and played his final game on July 4, 2009.
Jeff Baisley debuted on September 9, 2008 and played his final game on September 28, 2008.
Jeff Bajenaru debuted on September 4, 2004 and played his final game on August 7, 2006.
Jeff Baker debuted on April 4, 2005 and played his final game on September 27, 2013.
Jeff Baldwin debuted on May 22, 1990 and played his final game on June 4, 1990.
Jeff Ballard debuted on May 9, 1987 and played his final game on July 8, 1994.
Jeff Banister debuted on July 23, 1991 and played his final game on July 23, 1991.
Jeff Barkley debuted on September 16, 1984 and played his final game on July 26, 1985.
Jeff Barry debuted on June 9, 1995 and played his final game on October 3, 1999.
Jeff Beliveau debuted on July 22, 2012 and played his final game on September 27, 2013.