Jeff Nelson (umpire)

Jeffrey Brian Nelson (born June 1, 1965) is an American former professional baseballumpire in Major League Baseball (MLB), who was named to the National League (NL) staff prior to the 1999 season, and worked in both major leagues from 2000 until his retirement after the 2023 regular season.

A graduate of Bethel University in St. Paul, Minnesota, he wore uniform number 45. Nelson was a crew chief from 2014 to 2023.