Vanover worked in several minor leagues before his major league debut in 1991. He officiated in the
South Atlantic League,
Midwest League,
Southern League,
American Association,
Pacific Coast League,
International League and
Venezuelan League. Vanover was behind the plate when
Marge Schott came on the field just prior to an April 1996 Astros–Reds doubleheader and apologized to Vanover for her Opening Day comments following the death of umpire
John McSherry. The Opening Day game had been postponed after McSherry collapsed on the field; he died at a local hospital. After the game was postponed, Schott had said, "I feel cheated." Vanover was one of 22 umpires who resigned during the
1999 Major League Umpires Association mass resignation. The negotiation strategy failed when baseball officials simply accepted the resignations and hired replacement umpires. After a protracted legal battle, Vanover and eight other umpires regained their major league jobs for the 2002 season. MLB appointed Vanover to serve as crew chief for the 2014 Legend Series at
Rod Carew Stadium in
Panama City,
Panama, on March 15–16. Vanover spent the 2014 season as an interim crew chief while regular crew chief
Tim McClelland was on the
disabled list. In September 2014, Vanover was the home plate umpire for
Derek Jeter's final game. Vanover was officially promoted to permanent crew chief upon McClelland's retirement prior to the 2015 season. On May 24, 2019, Vanover umpired his 3,000th MLB game. On April 12, 2023, Vanover was hit in the head by
Cleveland Guardians infielder
Andrés Giménez's relay throw to home attempting to throw out
Oswaldo Cabrera. Vanover was hospitalized for his non-life-threatening injuries. He retired following the 2024 season. ==See also==