 |
|
|
| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Player | From-To | W | L | Pct | ERA | G | GS | CG | SHO | SV | IP | H | ER | HR | BB | SO |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Bob O'Brien | 1996-2000 | 11 | 16 | .407 | 3.55 | 104 | 12 | 0 | 0 | 25 | 200.1 | 186 | 79 | 20 | 57 | 200 |
| Ryan O'Rourke | 1982-1988 | 24 | 13 | .649 | 2.34 | 184 | 0 | 0 | 0 | 30 | 277.1 | 219 | 72 | 16 | 122 | 306 |
| Denny O'Toole | 1984-1990 | 4 | 2 | .667 | 4.00 | 42 | 1 | 0 | 0 | 2 | 78.2 | 86 | 35 | 7 | 19 | 82 |
| Jake Odorizzi | 1989-1998 | 26 | 27 | .491 | 3.47 | 80 | 80 | 11 | 4 | 0 | 511.2 | 475 | 197 | 28 | 130 | 547 |
| Omar Olivares | 1980-1980 | 1 | 1 | .500 | 3.18 | 2 | 2 | 2 | 0 | 0 | 17.0 | 13 | 6 | 3 | 1 | 19 |
| Lester Oliveros | 1985-1985 | 2 | 0 | 1.000 | 1.47 | 10 | 0 | 0 | 0 | 1 | 18.1 | 13 | 3 | 1 | 6 | 15 |
| Kevin Olsen | 1991-1993 | 1 | 1 | .500 | 4.72 | 33 | 2 | 0 | 0 | 4 | 76.1 | 84 | 40 | 4 | 35 | 94 |
| Ole Olsen | 1994-1995 | 10 | 6 | .625 | 3.64 | 75 | 15 | 0 | 0 | 2 | 178.0 | 171 | 72 | 15 | 50 | 219 |
| Scott Olsen | 1980-1983 | 1 | 0 | 1.000 | 2.59 | 13 | 0 | 0 | 0 | 0 | 24.1 | 19 | 7 | 1 | 13 | 30 |
| Vern Olsen | 1997-1999 | 11 | 5 | .688 | 2.23 | 24 | 23 | 0 | 0 | 1 | 129.1 | 109 | 32 | 6 | 26 | 167 |
| Garrett Olson | 1988-1989 | 11 | 9 | .550 | 4.90 | 62 | 27 | 0 | 0 | 0 | 192.2 | 230 | 105 | 21 | 48 | 205 |
| Reese Olson | 1992-1998 | 73 | 62 | .541 | 3.86 | 187 | 159 | 44 | 8 | 1 | 1202.0 | 1211 | 515 | 96 | 396 | 1293 |
| Tyler Olson | 1983-1986 | 10 | 7 | .588 | 3.43 | 125 | 0 | 0 | 0 | 19 | 188.2 | 161 | 72 | 12 | 58 | 224 |
| Ed Olwine | 1997-1999 | 6 | 16 | .273 | 5.53 | 52 | 29 | 0 | 0 | 0 | 184.0 | 225 | 113 | 33 | 49 | 154 |
| Brian Omogrosso | 1988-1994 | 8 | 10 | .444 | 4.61 | 170 | 8 | 0 | 0 | 10 | 312.2 | 341 | 160 | 26 | 112 | 295 |
| Jesse Orosco | 1999-2000 | 19 | 3 | .864 | 2.39 | 95 | 0 | 0 | 0 | 20 | 158.1 | 128 | 42 | 10 | 78 | 187 |
| Phil Ortega | 1993-1996 | 35 | 11 | .761 | 2.26 | 60 | 59 | 3 | 3 | 0 | 398.0 | 307 | 100 | 19 | 84 | 512 |
| Baby Ortiz | 1990-1993 | 20 | 18 | .526 | 6.20 | 102 | 62 | 0 | 0 | 0 | 348.1 | 488 | 240 | 31 | 110 | 205 |
| Luis Ortiz | 1991-1997 | 16 | 30 | .348 | 3.01 | 276 | 2 | 0 | 0 | 26 | 505.1 | 462 | 169 | 19 | 158 | 484 |
| Bob Osborn | 1998-2000 | 22 | 15 | .595 | 3.58 | 65 | 64 | 0 | 0 | 0 | 365.0 | 338 | 145 | 26 | 116 | 323 |
| Pat Osburn | 1999-2000 | 2 | 3 | .400 | 4.60 | 24 | 7 | 0 | 0 | 0 | 72.1 | 68 | 37 | 8 | 30 | 58 |
| Charlie Osgood | 1997-2000 | 33 | 42 | .440 | 4.84 | 112 | 112 | 1 | 0 | 0 | 544.2 | 549 | 293 | 68 | 208 | 392 |
| Bill Oster | 1984-1986 | 13 | 6 | .684 | 4.55 | 109 | 0 | 0 | 0 | 4 | 221.2 | 260 | 112 | 7 | 85 | 140 |
| Antonio Osuna | 1987-1995 | 57 | 46 | .553 | 2.83 | 319 | 28 | 6 | 1 | 80 | 728.0 | 657 | 229 | 47 | 223 | 916 |
| Dave Otto | 1994-1997 | 23 | 18 | .561 | 2.87 | 101 | 36 | 11 | 4 | 7 | 405.0 | 376 | 129 | 14 | 96 | 464 |
| Mike Overy | 1981-1987 | 24 | 10 | .706 | 3.17 | 203 | 2 | 0 | 0 | 18 | 409.1 | 360 | 144 | 37 | 119 | 437 |
| Johan Oviedo | 1993-2000 | 60 | 42 | .588 | 3.42 | 126 | 126 | 8 | 3 | 0 | 816.1 | 699 | 310 | 37 | 287 | 939 |
