Jim Reynolds became an Umpire Supervisor during the 2023 season following more than 23 years as a Major League Umpire. In this capacity, he serves as a liaison to the Major League Umpires.

The Massachusetts-born Reynolds became a Major League Umpire in 1999 after beginning his Minor League career in 1992. During his career, he worked three Wild Card rounds, eight Division Series, five League Championship Series, two World Series, and two All-Star Games. He was on the field for the Fall Classic in 2014 and 2018.

Jim graduated from South Catholic High School in Hartford, Connecticut, and then received a B.A. in Communications Journalism from the University of Connecticut in 1991. He began umpiring while at UConn under former baseball coach Andy Baylock.

Jim long served as Vice President of Umps Care Charities, the official philanthopy of the Major League Baseball umpires. The Arizona resident and his wife, Deanna, have one child. Deanna is heavily involved in UMPS CARE Charities, and was named a Point of Light honoree for her volunteerism. Points of Light is a national organization created by former President H.W. George Bush.