Gary Richard Darling is an American former umpire in Major League Baseball. After beginning his career in the National League from 1986 to 1999, he worked throughout both major leagues from 2002 until his retirement in 2014. He wore uniform number 37.
Jerry Blake Layne is an American umpire in Major League Baseball who has worked in the National League between 1989 and 1999, and throughout both major leagues since 2000. He wore uniform number 24 in the NL, but when MLB merged the AL and NL umpiring staffs in 2000, Layne was forced to switch to number 26, as AL umpire Al Clark, who also wore 24, had more seniority. When Clark was fired midway through the 2001 season by MLB, Layne reclaimed number 24 and has worn it ever since. With Joe West's retirement in 2022, Layne became MLB's most senior active umpire.
James Michael Wolf is an American Major League Baseball umpire. He joined the major league staff in 1999 after working in the Arizona Rookie League, the South Atlantic League, the California League, the Texas League and the Pacific Coast League. He wears uniform number 28.
Edward George Barrett is an American retired Major League Baseball umpire. He joined the American League's staff in 1994, and worked throughout both major leagues from 2000 until his retirement in 2022. Promoted to crew chief in 2013, Barrett worked in 33 play-off series, including five World Series. He retired following the 2022 season.
Michael John Winters is an American former umpire in Major League Baseball who has worked in the National League from 1988 to 1999 and throughout both major leagues from 2000 to 2019, wearing number 33. For the 2011 season, Winters was named a crew chief following the retirements of Jerry Crawford, Mike Reilly, and Chuck Meriwether.
Fieldin Henry Culbreth III is an American former umpire in Major League Baseball (MLB). He worked in the American League from 1993 to 1999 and in both major leagues from 2000 until his retirement in 2021. Culbreth was promoted to crew chief prior to the 2013 season. Culbreth wore number 42 while he was an American League umpire, then changed to 25 in 2000 after the MLB umpires were unified into one crew.
William Scott Miller is an American Major League Baseball umpire who began his career in the American League in 1997. Miller wears number 26. He has been a crew chief since the 2014 season.
Todd Frederick Tichenor is an American professional baseball umpire. He became a Major League Baseball reserve umpire in 2007 and was promoted to the full-time MLB staff in 2012. He wore number 97 until the 2014 season, when he switched to number 13.
Samuel Woodford Holbrook is an American retired Major League Baseball umpire. He made his MLB debut in 1996 and was promoted to crew chief in 2017. Holbrook worked the World Series in 2010, 2016, and 2019. He retired following the 2022 season.
Brian Michael Knight is an American professional baseball umpire. He has worked as a full-time Major League Baseball (MLB) umpire since 2011. He wears uniform number 91.
Robert Paul Drake is an American umpire in Major League Baseball. He was named to the Major League staff in 2010, and wears uniform number 8.
Victor Joseph Carapazza is an American Major League Baseball umpire. He wears uniform number 19, and previously wore uniform number 85.
Lance Cole Barrett is an American umpire in Major League Baseball (MLB). He wore number 94 but changed to 16 starting in the 2020 season. Barrett became a minor league umpire in 2003 and was hired to the MLB staff prior to the 2014 season.
Michael William Muchlinski is an American Major League Baseball umpire. He umpired his first Major League game on April 24, 2006, and was officially hired by MLB prior to the 2014 season.
Michael Joseph Estabrook is an American Major League Baseball umpire. He made his first umpiring appearance at the Major League level on May 7, 2006. Estabrook wears uniform number 83. It was announced on January 14, 2014, that Estabrook was added to the full-time MLB Umpire staff.
Cory Steven Blaser is an American Major League Baseball umpire. He umpired his first major league game on April 24, 2010.
Manuel Augusto González is a Venezuelan umpire in Major League Baseball (MLB). He made his major-league umpiring debut on May 17, 2010, filling in for John Hirschbeck, becoming the first Venezuelan umpire in MLB history.
Quinn Wolcott is an American umpire in Major League Baseball. He wears number 81.
Hal Harrison Gibson III, known as Tripp Gibson, is an American Major League Baseball umpire who wears uniform number 73. Gibson's first Major League game was July 8, 2013, at Chase Field in Phoenix, Arizona. He was promoted to a full-time position in January 2015. Prior to his hiring, he worked as a substitute teacher during the offseason.
Chad Robert Whitson is an American umpire in Major League Baseball (MLB) who was hired to the full-time staff in 2019 and wears number 62. He was born in Dublin, Ohio. He made his MLB debut on May 15, 2014. He has also umpired in the Gulf Coast League, the Appalachian League, the South Atlantic League, the California League, the Eastern League, the International League, and the Arizona Fall League.
