NEW YORK -- Mike DiMuro, among three father-son duos to work home plate in a major league no-hitter, is retiring after two decades as an umpire.
He is being replaced on the big league staff by Chad Whitson, the commissioner's office said Thursday.
The 51-year-old DiMuro made his major league debut at second base in Boston's game at Kansas City on July 31, 1997, and became a full-time member of the big league staff in 1999. Bothered by back problems in recent years, he has not worked since he was at second for Miami's game at Washington on July 8 last year.