In baseball, the umpire is the person charged with officiating the game, including beginning and ending the game, enforcing the rules of the game and the grounds, making judgment calls on plays, and handling the disciplinary actions. The term is often shortened to the colloquial form ump. They are also sometimes addressed as blue at lower levels due to the common color of the uniform worn by umpires. In professional baseball, the term blue is seldom used by players or managers, who instead call the umpire by name. Although games were often officiated by a sole umpire in the formative years of the sport, since the turn of the 20th century, officiating has been commonly divided among several umpires, who form the umpiring crew. The position is analogous to that of a referee in many other sports.
Harold Douglas Harvey was an umpire in Major League Baseball (MLB), who worked in the National League (NL) from 1962 through 1992.
Bruce Neal Froemming is Major League Baseball Special Assistant to the Vice President on Umpiring, after having served as an umpire in Major League Baseball. He first umpired in the National League in 1971, and from 2000 to 2007 worked throughout both major leagues. Early in the 2007 season, Froemming tied Bill Klem for the most seasons umpired. Previously, on August 16, 2006, Froemming umpired his 5,000th game between the Detroit Tigers and Boston Red Sox at Fenway Park, making him the second umpire to reach that milestone; Klem retired after 5,374 games. Froemming now stands third on the all-time list of games umpired, having been passed when Joe West officiated his 5,164th Major League Baseball game on August 14, 2019. On April 20, 2007, he umpired at first base in the Cleveland Indians-Tampa Bay Devil Rays game, passing Klem to become – at age 67 years 204 days – the man then believed to be the oldest umpire in major league history; Hank O'Day holds the record, retiring at 68 years, 2 months. He worked his final regular-season game at age 68 years 2 days on September 30, 2007, when Froemming received a standing ovation before umpiring his last regular-season game, manning the third base position as the Milwaukee Brewers hosted the San Diego Padres at Miller Park in his native Milwaukee, with much of his family in attendance. Because Froemming was then over age 65, he became eligible for election to the Baseball Hall of Fame in 2010 instead of having to wait the customary five years.
Dale Allan Scott is an American former umpire in Major League Baseball. He worked in the American League from 1986 to 1999, and officiated in both leagues from 2000 until his retirement after the 2017 season. He became a crew chief in 2001. He wore uniform number 39 his first two years and number 5, previously worn in the AL by Russ Goetz, thereafter.
Gerald Sidney Davis is an American former umpire in Major League Baseball. He worked in the National League from 1982 to 1999 and in Major League Baseball from 2000 to 2021. He was promoted to crew chief in 1999. Davis umpired five World Series, nine League Championship Series and eleven League Division Series. He also worked in the All-Star Game four times. Davis wore uniform number 12 throughout his career.
Joseph Norbert Brinkman is an American former umpire in Major League Baseball (MLB) who worked in the American League (AL) from 1972 to 1999 and throughout both major leagues from 2000 until his retirement during the 2006 season.
Derryl Cousins was an American umpire in Major League Baseball (MLB), who worked in the American League (AL) from 1979 to 1999, and umpired throughout both leagues from 2000 until his retirement following the 2012 season, ending his career as a crew chief.
Ángel Hernández is a Cuban-American umpire in Major League Baseball (MLB). He worked in the National League from 1991 to 1999, and has worked throughout MLB since 2000.
Michael Eugene Reilly is a former Major League Baseball umpire who worked in the American League from 1977 to 1999 and throughout both major leagues from 2000 to 2010. Upon Ed Montague's retirement in February 2010, Reilly became Major League Baseball's senior umpire; his 4,362 career games ranked ninth in major league history entering the 2010 season. He retired on February 23, 2011, along with fellow umpires Jerry Crawford and Chuck Meriwether.
John Francis Hirschbeck is a former umpire for Major League Baseball. He worked in the American League from 1984 to 1999 and worked in both leagues from 2000 to 2016. He was a crew chief at the time of his retirement, and wore uniform number 17 throughout his career. Hirschbeck announced his retirement following the 2016 season. In 2000, Hirschbeck was elected as the first president of the newly certified World Umpires Association, a position he held until 2009.
Gerald Joseph Crawford is a former umpire in Major League Baseball. He first umpired in the National League from 1977 to 1999, then worked in both major leagues from 2000 to 2010.
Edward Michael Montague is an American former umpire in Major League Baseball. He worked in the National League in 1974 and from 1976 to 1999, and officiated throughout both leagues between 2000 and 2009. The most senior active umpire in the major leagues at the time of his retirement, he wore uniform number 11 throughout his career. His 4,369 total games ranked eighth in major league history when he retired, and he is one of only three umpires to serve as crew chief for the World Series four times.
Lazaro Antonio Díaz Sr. is an American umpire in Major League Baseball wearing number 63, a reference to his year of birth. He joined the American League's full-time staff in 1999, and has worked throughout both major leagues since 2000. Díaz was promoted to crew chief for the 2022 season, becoming the second full time Latino crew chief, after Alfonso Marquez.
Timothy Joseph Tschida is a former umpire in Major League Baseball. He joined the American League's full-time staff in 1986, and worked in both major leagues from 2000 until his retirement following the 2012 season.
James Alfred Joyce III is an American former professional baseball umpire who worked in the American League (AL) from 1987 to 1999 and throughout Major League Baseball (MLB) from 2000 to 2016. He wore uniform number 6 while in the AL and number 66 for MLB. His loud and enthusiastic strike call drew comparisons to that of retired umpire Bruce Froemming. Though his umpiring was generally praised by players and coaches, Joyce is best known for his incorrect call in Armando Galarraga's near-perfect game in June 2010.
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.
Jeffrey William Kellogg is a retired Major League Baseball umpire who worked in the National League from 1991 to 1999 and throughout both major leagues from 2000 to 2019. He wore uniform number 8, formerly worn in the NL by Hall of Fame umpire Doug Harvey from 1962 to 1992.
Mark Patrick Wegner is an American Major League Baseball umpire. He worked in the National League from 1998 to 1999, and throughout both major leagues since 2000. He was promoted to Crew Chief for the 2018 MLB season when Dale Scott retired after the 2017 MLB season.
C. B. Bucknor is a Jamaican umpire in Major League Baseball (MLB) who worked in the National League (NL) from 1996 to 1999 and has worked in both major leagues since 2000.
Thomas Francis Hallion is a retired Major League Baseball umpire who worked in the National League (NL) from 1985 to 1999 and in both major leagues from 2005 until 2022. He was promoted to crew chief in 2010. Hallion has worn number 20 during his MLB career. He resigned from the NL in 1999 as part of a failed mass bargaining strategy, but he was rehired by MLB before the 2005 season.
