| Pete Sims | |
| Position: | Pitcher |
| Bats: | Right |
| Throws: | Right |
| Birth Date: | 24 May 1891 |
| Birth Place: | Crown City, Ohio |
| Death Place: | Dallas, Texas |
| Debutleague: | MLB |
| Debutdate: | September 16 |
| Debutteam: | St. Louis Browns |
| Finalleague: | MLB |
| Finaldate: | September 23 |
| Finalteam: | St. Louis Browns |
| Statleague: | MLB |
| Stat1label: | Win–loss record |
| Stat1value: | 1-0 |
| Stat2label: | Earned run average |
| Stat2value: | 4.32 |
| Stat3label: | Strikeouts |
| Stat3value: | 4 |
| Teams: | |
Clarence "Pete" Sims (May 24, 1891 – December 2, 1968) was a Major League Baseball pitcher who played for the St. Louis Browns in .
A single in his only at-bat left Sims with a rare MLB career batting average of 1.000.