Jason Alan Grimsley
- Bats Right, Throws Right
- Height 6' 3", Weight 180 lb.
- High School Tarkington High School
- Debut September 8, 1989
- Final Game May 31, 2006
- Born August 7, 1967 in Cleveland, TX USA
Originally a shortstop, pitcher Jason Grimsley was discovered at a Philadelphia Phillies tryout camp in Arlington, TX. He was signed as a 11th round pick in the 1985 amateur draft by the Phillies and scout Doug Gassaway.
On June 6, 2006, federal agents searched his home as part of a steroid investigation. He asked for his release from the Arizona Diamondbacks and was let go the next day. Several months later, the Los Angeles Times reported that he had claimed that Roger Clemens, Andy Pettitte, Miguel Tejada, Brian Roberts and Jay Gibbons used illegal substances but the federal judge reviewing the case said that the Times story contained "significant inaccuracies".
- Won two World Series with the New York Yankees (1999 & 2000; he did not play in the 2000 World Series)