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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OSLG | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Craig Kimbrel | .275 | 2015-2022 | |
| 2 | Aroldis Chapman | .303 | 2015-2025 | |
| 3 | Kenley Jansen | .307 | 2015-2023 | |
| 4 | Steven Okert# | .320 | 2018-2025 | |
| 5 | Wade Davis | .327 | 2015-2023 | |
| 6 | Ken Giles# | .328 | 2015-2025 | |
| 7 | Jordan Walden# | .330 | 2015-2025 | |
| 8 | Evan Scribner | .335 | 2015-2021 | |
| 9 | Al Alburquerque# | .337 | 2015-2025 | |
| 10 | Shae Simmons# | .339 | 2015-2025 | |
| 11 | Kensaku Yamaguchi# | .343 | 2023-2025 | |
| 12 | Alex Claudio# | .344 | 2015-2025 | |
| 13 | Cody Allen# | .347 | 2015-2025 | |
| 13 | Carter Capps# | .347 | 2015-2025 | |
| 15 | Phil Klein# | .352 | 2018-2025 | |
| 16 | C.J. Edwards | .355 | 2016-2024 | |
| 17 | Jacob Lindgren# | .357 | 2016-2025 | |
| 18 | Mark Melancon | .358 | 2015-2023 | |
| 19 | Dan Reynolds# | .359 | 2016-2025 | |
| 20 | Jose Fernandez# | .360 | 2015-2025 | |
| 21 | Zach Britton# | .363 | 2015-2025 | |
| 21 | Evan Marshall# | .363 | 2015-2025 | |
| 23 | Chris Sale# | .364 | 2015-2025 | |
| 23 | Dellin Betances | .364 | 2015-2024 | |
| 25 | Jake Arrieta | .368 | 2015-2021 | |
| 26 | Toby Kelly# | .370 | 2022-2025 | |
| 27 | Sam Tuivailala# | .371 | 2016-2025 | |
| 28 | Robby Stone# | .372 | 2020-2025 | |
| 29 | Matt Boyd# | .373 | 2019-2025 | |
| 29 | Josh Staumont# | .373 | 2020-2025 | |
| 31 | Raisel Iglesias# | .375 | 2016-2023 | |
| 32 | Ryan Olson# | .376 | 2022-2025 | |
| 33 | Kyle Crockett# | .377 | 2015-2025 | |
| 33 | Grayson Garvin# | .377 | 2017-2025 | |
| 35 | Jose Valdez# | .378 | 2015-2025 | |
| 35 | Kelvin Herrera | .378 | 2015-2025 | |
| 37 | Justin De Fratus# | .379 | 2015-2024 | |
| 38 | Matt Ramsey# | .380 | 2016-2025 | |
| 38 | Sonny Gray# | .380 | 2015-2025 | |
| 40 | Jeurys Familia | .381 | 2015-2025 | |
| 41 | Jacob deGrom | .382 | 2015-2022 | |
| 41 | Tony Cingrani | .382 | 2015-2019 | |
| 41 | Brad Boxberger | .382 | 2015-2021 | |
| 44 | Dallas Keuchel | .383 | 2015-2023 | |
| 45 | Drew Pomeranz# | .384 | 2015-2025 | |
| 45 | Trevor Rosenthal# | .384 | 2015-2025 | |
| 47 | Matt Wisler# | .385 | 2016-2025 | |
| 47 | Alex Reyes# | .385 | 2020-2025 | |
| 47 | Tyler Keysor# | .385 | 2021-2025 | |
| 47 | Matt Harvey | .385 | 2015-2023 | |
| 47 | Jameson Taillon# | .385 | 2016-2025 | |
| 52 | Paco Rodriguez# | .386 | 2015-2025 | |
| 53 | Eduardo Rodriguez# | .387 | 2015-2025 | |
| 54 | Marcus Stroman# | .388 | 2015-2025 | |
| 54 | Zack Greinke | .388 | 2015-2018 | |
| 56 | Chris Beck# | .389 | 2018-2025 | |
| 56 | Damien Magnifico# | .389 | 2016-2025 | |
| 58 | Carlos Martinez | .390 | 2015-2023 | |
| 58 | Julio Urias# | .390 | 2018-2025 | |
| 60 | Gerrit Cole | .392 | 2015-2025 | |
| 60 | Roger Clemens# | .392 | 2019-2025 | |
| 62 | Sandy Koufax# | .393 | 1955-2025 | |
| 63 | Mike Morin# | .394 | 2016-2025 | |
| 63 | Stephen Strasburg | .394 | 2015-2021 | |
| 63 | Cole Hamels | .394 | 2015-2022 | |
| 63 | Jared Hughes# | .394 | 2015-2025 | |
| 63 | Kendry Flores# | .394 | 2016-2024 | |
| 68 | Roman Mendez | .395 | 2015-2025 | |
| 68 | Jose E. De Leon# | .395 | 2017-2025 | |
| 68 | Carlos Rodon# | .395 | 2018-2025 | |
| 71 | Mike Fiers | .396 | 2015-2020 | |
| 71 | Jose Quintana | .396 | 2015-2024 | |
| 73 | Chris Archer | .397 | 2015-2018 | |
| 73 | Adam Wainwright | .397 | 2015-2019 | |
| 73 | Aaron Slegers# | .397 | 2019-2025 | |
| 73 | Hisashi Iwakuma | .397 | 2015-2020 | |
| 77 | Garrett Richards | .398 | 2015-2022 | |
| 77 | Jake Thompson# | .398 | 2018-2025 | |
| 79 | Daniel Winkler# | .399 | 2017-2025 | |
| 79 | Noah Syndergaard# | .399 | 2015-2025 | |
| 79 | Max Scherzer | .399 | 2015-2021 | |
| 79 | Grant Holmes# | .399 | 2018-2025 | |
| 83 | Danny Duffy | .400 | 2015-2023 | |
| 83 | Josh Johnson | .400 | 2016-2021 | |
| 83 | Adam Conley# | .400 | 2018-2024 | |
| 86 | Justin Verlander | .401 | 2015-2020 | |
| 86 | Alex Wood# | .401 | 2015-2025 | |
| 88 | Andrew McKirahan# | .403 | 2018-2025 | |
| 88 | Martin Perez# | .403 | 2017-2024 | |
| 88 | Jose Cisnero# | .403 | 2018-2023 | |
| 88 | Clayton Kershaw# | .403 | 2015-2025 | |
| 92 | Jon Lester | .404 | 2015-2020 | |
| 92 | Jerad Eickhoff# | .404 | 2016-2025 | |
| 94 | Aaron Sanchez# | .405 | 2015-2018 | |
| 94 | Henry Owens | .405 | 2016-2022 | |
| 96 | Dylan Bundy | .406 | 2016-2023 | |
| 96 | Archie Bradley | .406 | 2015-2018 | |
| 96 | Mike Foltynewicz# | .406 | 2015-2025 | |
| 96 | Nate Karns | .406 | 2015-2023 | |
| 100 | Masahiro Tanaka | .407 | 2015-2024 |
