Jack O'Brien
Baseball Reference Page
| Team | Year | Pos | AB | R | H | HR | RBI | AVG | RC | Def RP | Tot | RPG |
| PH4 | 1882 | C | 241 | 44 | 73 | 3 | 37 | 0.303 | 25.1 | 14.8 | 39.9 | 0.712 |
| PH4 | 1883 | C | 390 | 74 | 113 | 0 | 70 | 0.290 | 40.1 | -12.6 | 27.6 | 0.298 |
| PH4 | 1884 | C | 138 | 25 | 39 | 1 | 0 | 0.283 | 11.5 | 3.9 | 15.4 | 0.466 |
| PH4 | 1885 | C | 225 | 35 | 60 | 2 | 30 | 0.267 | 21.2 | -1.9 | 19.4 | 0.352 |
| PH4 | 1886 | C | 423 | 65 | 107 | 0 | 56 | 0.253 | 29.1 | -30.0 | -0.9 | -0.008 |
| BR3 | 1887 | C | 123 | 18 | 28 | 1 | 17 | 0.228 | -0.1 | -11.0 | -11.0 | -0.348 |
| BL2 | 1888 | C | 196 | 25 | 44 | 0 | 18 | 0.224 | 15.0 | -17.9 | -2.9 | -0.057 |
| PH4 | 1890 | 1B | 433 | 80 | 113 | 4 | 80 | 0.261 | 42.0 | -0.3 | 41.8 | 0.392 |