Oscar Theodore Horstmann (June 2, 1891 – May 11, 1977) was a Major League Baseball pitcher who played with the St. Louis Cardinals from 1917 to 1919.
Oscar Horstmann
| Given name: | Oscar Theodore Horstmann |
| Nicknames: | None |
| Primary Pos: | Pitcher |
| Hght/Wght: | 5'11" / 165 lbs |
| Bats/Throws: | R / R |
| Born: | Jun 2, 1891 in Alma, MO |
| Died: | May 11, 1977 in Salina, KS (85 years old) |
| Debut: | Apr 18, 1917 |