Otto Deininger
- Given Name
- Otto Charles
- Nickname(s)
- Pep
- Born
- 10/10/1877 — Wasseralfingen, Baden-Württemberg, Germany
- Died
- 9/25/1950 — Boston, MA, USA
- Weight
- 180 lbs
- Height
- 5' 8"
- Throws
- L
- Bats
- L
- Team(s)
- Boston Americans (1902)Philadelphia Phillies (1908–1909)
- Debut
- 1902-04-26
- Final Game
- 1909-10-07