| Cory Blaser | |
|---|---|
 Blaser in 2013 | |
| Born:December 8, 1981 Denver, Colorado, U.S. | |
| MLB debut | |
| April 24, 2010 | |
| Crew Information | |
| Umpiring crew | 16 |
| Crew members |
|
| Career highlights and awards | |
| Special Assignments | |
Cory Steven Blaser (born December 8, 1981) is an American Major League Baseball umpire. He umpired his first major league game on April 24, 2010.
Blaser is a graduate of Pomona High School and attended Colorado State University. [1] He had previously worked in the Arizona League Northwest League, Midwest League Carolina League Eastern League Florida Instructional League, and Arizona Instructional League. [1] Blaser attended the Harry Wendelstedt Umpire School, and works as an instructor there in the off-season. [1]
Blaser was officially named to the full-time MLB staff prior to the 2014 season. [2] His uniform number is 89.
Blaser worked his first career MLB postseason game in right field on October 7, 2015, serving in the 2015 National League Wild Card Game between the Chicago Cubs and the Pittsburgh Pirates. [3]
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.
Jeffrey Brian Nelson is an American former professional baseball umpire in Major League Baseball (MLB), who was named to the National League (NL) staff prior to the 1999 season, and worked throughout both major leagues from 2000 until his retirement after the 2023 regular season.
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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.
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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.
Alan Dwayne Porter Jr. is an American Major League Baseball umpire. He umpired his first Major League game on April 5, 2010. He wears uniform number 64.
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.
David Ross Rackley is an American Major League Baseball umpire. He made his Major League umpiring debut on August 13, 2010. He wears uniform number 86.
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