Jeffrey Scott Schaefer
- Bats Right, Throws Right
- Height 5' 10", Weight 170 lb.
- School University of Maryland
- High School Patchogue-Medford High School
- Debut April 7, 1989
- Final Game June 15, 1994
- Born May 31, 1960 in Patchogue, NY USA
Jeff Shaefer hit both of his career home runs for the Seattle Mariners against the Chicago White Sox at U.S. Cellular Field. He hit the first on June 24, 1991 off Greg Hibbard and the second on April 15, 1992 off Kirk McCaskill. Shaefer batted 9th and played shortstop in both games.
Jeff played the role of "Pirate on Second Base" in the 1994 movie Major League II.