Mark Philip Schaeffer
- Bats Left, Throws Left
- Height 6' 5", Weight 215 lb.
- High School Cleveland High School (Reseda, CA)
- Debut April 18, 1972
- Final Game September 26, 1972
- Born June 5, 1948 in Santa Monica, CA USA
Pitcher Mark Schaeffer played one year in the majors with the San Diego Padres.
Schaeffer was originally chosen by the San Francisco Giants in the 37th round of the 1965 amateur draft, but his selection was voided. He was then taken by the Boston Red Sox in the January 1966 amateur draft and made his pro debut that year with the Waterloo Hawks, going 13-9 with a 2.78 ERA. Prior to the 1969 season, he was traded to the Houston Astros for catcher Hal King. He was then dealt to the Padres after the 1971 campaign.
Schaeffer made the Padres' Opening Day roster in 1972. He appeared in 41 games for the team, recording his only big league save in a seventeen-inning game against the Cincinnati Reds on July 29th. Overall, he went 2-0 with a 4.61 ERA for the club, pitching 41 innings.