| Elmer Rieger | |
| Width: | 150px |
| Position: | Pitcher |
| Bats: | Both |
| Throws: | Right |
| Birth Date: | 25 February 1889 |
| Birth Place: | Perris, California |
| Death Place: | Los Angeles, California |
| Debutleague: | MLB |
| Debutdate: | April 20 |
| Debutteam: | St. Louis Cardinals |
| Finalleague: | MLB |
| Finaldate: | July 20 |
| Finalteam: | St. Louis Cardinals |
| Statleague: | MLB |
| Stat1label: | Win–loss record |
| Stat1value: | 0–2 |
| Stat2label: | Earned run average |
| Stat2value: | 5.48 |
| Stat3label: | Strikeouts |
| Stat3value: | 9 |
| Teams: | |
Elmer Jay Rieger (February 25, 1889 to October 21, 1959), was a Major League Baseball pitcher who played in with the St. Louis Cardinals. He batted right and left and threw right-handed. Rieger had a 0–2 record, with a 5.48 ERA, in 13 games, in his one-year career.
He was born in Perris, California and died in Los Angeles, California.