| Rolla Mapel | |
| Position: | Pitcher |
| Bats: | Left |
| Throws: | Left |
| Birth Date: | 9 March 1890 |
| Birth Place: | Lee's Summit, Missouri |
| Death Place: | San Diego, California |
| Debutleague: | MLB |
| Debutdate: | August 31 |
| Debutyear: | 1919 |
| Debutteam: | St. Louis Browns |
| Finalleague: | MLB |
| Finaldate: | September 11 |
| Finalyear: | 1919 |
| Finalteam: | St. Louis Browns |
| Statleague: | MLB |
| Stat1label: | Win–loss record |
| Stat1value: | 0–3 |
| Stat2label: | Earned run average |
| Stat2value: | 4.50 |
| Stat3label: | Strikeouts |
| Stat3value: | 2 |
| Teams: | |
Rolla Hamilton Mapel (March 9, 1890 – April 6, 1966) was a Major League Baseball pitcher who played for the St. Louis Browns in .