Jeff Karstens debuted on August 22, 2006, playing for the New York Yankees at Yankee Stadium II; he played his final game on October 1, 2012, playing for the Pittsburgh Pirates at PNC Park.
Jeff Karstens played in 9 games at pitcher for the Pittsburgh Pirates in 2008, starting in all of them. He played for a total of 154 outs, equivalent to 5.7 9-inning games. He made 3 putouts, had 6 assists, and committed 2 errors, equivalent to .351 errors per 9-inning game. He had one double play.
Jeff Karstens played in 26 games at pitcher for the Pittsburgh Pirates in 2010, starting in 19 of them. He played for a total of 368 outs, equivalent to 13.63 9-inning games. He made 12 putouts, had 15 assists, and committed no errors, equivalent to 0 errors per 9-inning game. He had one double play.
Jeff Karstens played in 8 games at pitcher for the New York Yankees in 2006, starting in 6 of them. He played for a total of 128 outs, equivalent to 4.74 9-inning games. He made 4 putouts, had 6 assists, and committed one error, equivalent to .211 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.