| Pete Treacey | |
| Position: | Shortstop |
| Bats: | Unknown |
| Throws: | Unknown |
| Birth Date: | c. 1852 |
| Birth Place: | Brooklyn, New York |
| Death Date: | Unknown |
| Debutleague: | MLB |
| Debutdate: | August 5 |
| Debutyear: | 1876 |
| Debutteam: | New York Mutuals |
| Finalleague: | MLB |
| Finalyear: | 1876 |
| Finalteam: | New York Mutuals |
| Statleague: | MLB |
| Stat1label: | Games played |
| Stat1value: | 2 |
| Stat2label: | Runs scored |
| Stat2value: | 1 |
| Stat3label: | Hits |
| Stat3value: | 0 |
| Stat4label: | Batting average |
| Stat4value: | .000 |
| Teams: | |
Peter Treacey was a professional baseball player who played shortstop in Major League Baseball in two games for the 1876 New York Mutuals. He played college ball at Fordham University. His brother, Fred Treacey, also played for the 1876 Mutuals.