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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OOBP | YEAR | Open Postseason Leaderboard |
|---|---|---|---|---|
| 1 | Carter Capps# | .248 | 2015-2025 | |
| 2 | Alex Claudio# | .258 | 2015-2025 | |
| 2 | Kensaku Yamaguchi# | .258 | 2023-2025 | |
| 4 | Jose Urena# | .261 | 2018-2025 | |
| 5 | Kolby Allard# | .269 | 2020-2025 | |
| 6 | Chris Sale# | .270 | 2015-2025 | |
| 7 | Cole Hamels | .271 | 2015-2022 | |
| 8 | Alex Reyes# | .286 | 2020-2025 | |
| 9 | Jose Fernandez# | .287 | 2015-2025 | |
| 10 | Zack Greinke | .289 | 2015-2018 | |
| 11 | Alex Wood# | .290 | 2015-2025 | |
| 12 | Aaron Blair# | .293 | 2020-2025 | |
| 13 | Madison Bumgarner# | .294 | 2015-2022 | |
| 14 | Joe Gray# | .298 | 2023-2025 | |
| 14 | Zach Petrick# | .298 | 2018-2025 | |
| 16 | Toby Kelly# | .303 | 2022-2025 | |
| 17 | Marcus Stroman# | .304 | 2015-2025 | |
| 17 | Aaron Nola# | .304 | 2015-2025 | |
| 19 | Jake Thompson# | .305 | 2018-2025 | |
| 20 | Jake Arrieta | .306 | 2015-2021 | |
| 21 | Matt Wisler# | .308 | 2016-2025 | |
| 21 | Jackson Kowar# | .308 | 2019-2025 | |
| 23 | Masahiro Tanaka | .315 | 2015-2024 | |
| 24 | Jerad Eickhoff# | .316 | 2016-2025 | |
| 25 | Anthony Molina# | .317 | 2022-2025 | |
| 25 | Dan Stevens# | .317 | 2022-2025 | |
| 27 | Noah Murdock# | .323 | 2023-2025 | |
| 27 | Justin De Fratus# | .323 | 2015-2024 | |
| 29 | Kelvin Herrera | .324 | 2015-2025 | |
| 29 | Matt Krook# | .324 | 2020-2025 | |
| 29 | Sonny Gray# | .324 | 2015-2025 | |
| 32 | Noah Syndergaard# | .332 | 2015-2025 | |
| 33 | Matt Harvey | .336 | 2015-2023 | |
| 34 | Grayson Garvin# | .340 | 2017-2025 | |
| 35 | Jordan Walden# | .345 | 2015-2025 | |
| 36 | Shelby Miller# | .348 | 2015-2025 | |
| 37 | Aaron Slegers# | .349 | 2019-2025 | |
| 38 | Carlos Martinez | .351 | 2015-2023 | |
| 39 | Robby Stone# | .354 | 2020-2025 | |
| 40 | Stephen Strasburg | .359 | 2015-2021 | |
| 41 | Ben Jordan# | .385 | 2021-2025 | |
| 42 | Takahiro Norimoto# | .417 | 2019-2025 | |
| 43 | Sandy Koufax# | .467 | 1955-2025 |
