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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OSLG | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Sandy Koufax | .2711 | 1955-1966 | |
| 2 | Steve Hamilton | .2786 | 1961-1972 | |
| 3 | Larry Dierker | .2921 | 1964-1976 | |
| 4 | Billy O'Dell | .2949 | 1954-1967 | |
| 5 | Bob Feller | .2965 | 1947-1956 | |
| 6 | Catfish Hunter | .2986 | 1965-1976 | |
| 7 | Bill Stafford | .3061 | 1960-1967 | |
| 8 | Adam Ottavino# | .3069 | 2010-2024 | |
| 9 | Johnny Antonelli | .3090 | 1948-1961 | |
| 10 | Craig Kimbrel# | .3203 | 2011-2026 | |
| 11 | Edwin Diaz# | .3262 | 2017-2026 | |
| 12 | Johnny Kucks | .3284 | 1955-1960 | |
| 13 | Russ Kemmerer | .3345 | 1954-1963 | |
| 14 | Kenley Jansen# | .3347 | 2012-2026 | |
| 15 | Andrew Miller | .3373 | 2007-2020 | |
| 16 | Aroldis Chapman# | .3440 | 2011-2026 | |
| 17 | Joe Nathan | .3455 | 2000-2016 | |
| 18 | David Robertson# | .3466 | 2010-2026 | |
| 19 | Smith Smith | .3468 | 2002-2018 | |
| 20 | Jonathan Broxton | .3517 | 2007-2017 | |
| 21 | Francisco Rodriguez | .3524 | 2003-2018 | |
| 22 | Brad Ziegler | .3533 | 2007-2018 | |
| 23 | Huston Street | .3553 | 2005-2016 | |
| 24 | Jeurys Familia | .3582 | 2010-2022 | |
| 25 | Sean Marshall | .3600 | 2007-2016 | |
| 26 | Lance McCullers Jr.# | .3606 | 2016-2026 | |
| 27 | Max Scherzer# | .3609 | 2009-2026 | |
| 28 | Jose Leclerc# | .3612 | 2018-2026 | |
| 29 | Jonathan Papelbon | .3614 | 2006-2017 | |
| 30 | Dylan Cease# | .3615 | 2015-2026 | |
| 31 | Jose Alvarez | .3625 | 2010-2023 | |
| 32 | Sean Doolittle | .3668 | 2011-2022 | |
| 33 | Trevor Rosenthal | .3683 | 2010-2023 | |
| 34 | Luke Gregerson | .3692 | 2010-2019 | |
| 35 | Joakim Soria | .3699 | 2007-2020 | |
| 36 | Tyler Clippard | .3702 | 2007-2019 | |
| 37 | Blake Snell# | .3721 | 2012-2026 | |
| 38 | Shane McClanahan# | .3723 | 2023-2026 | |
| 39 | Tarik Skubal# | .3724 | 2022-2026 | |
| 40 | Jesse Crain | .3726 | 2006-2015 | |
| 41 | Smith Smith | .3728 | 2005-2015 | |
| 41 | Stephen Strasburg | .3728 | 2010-2025 | |
| 43 | Raisel Iglesias# | .3732 | 2016-2026 | |
| 43 | Mark Melancon | .3732 | 2010-2023 | |
| 45 | Matt Belisle | .3746 | 2004-2018 | |
| 46 | Yu Darvish# | .3749 | 2012-2026 | |
| 47 | Felix Hernandez | .3752 | 2005-2021 | |
| 48 | Chad Billingsley | .3754 | 2007-2015 | |
| 49 | Oliver Drake | .3755 | 2010-2022 | |
| 50 | Steve Cishek | .3757 | 2012-2021 | |
| 51 | Josh M. Johnson | .3758 | 2006-2017 | |
| 52 | J.P. Howell | .3761 | 2008-2017 | |
| 53 | Ubaldo Jimenez | .3771 | 2010-2020 | |
| 54 | Rafael Soriano | .3777 | 2003-2015 | |
| 55 | Joe Smith | .3778 | 2008-2022 | |
| 56 | Darren O'Day | .3783 | 2010-2022 | |
| 57 | Trevor Bauer | .3793 | 2012-2023 | |
| 58 | Freddy Peralta# | .3805 | 2019-2026 | |
| 59 | Framber Valdez# | .3806 | 2022-2026 | |
| 60 | Brandon Maurer | .3811 | 2010-2018 | |
| 61 | Hunter Strickland# | .3821 | 2010-2023 | |
| 62 | Wade Davis | .3822 | 2009-2020 | |
| 63 | Aaron Nola# | .3825 | 2015-2026 | |
| 64 | Jake Peavy | .3833 | 2002-2018 | |
| 65 | Justin Steele# | .3839 | 2015-2026 | |
| 65 | Robbie Ross Jr. | .3839 | 2010-2017 | |
| 67 | Alex Colome | .3842 | 2010-2022 | |
| 68 | Smith Smith | .3844 | 2005-2014 | |
| 69 | Danny Salazar | .3845 | 2010-2021 | |
| 70 | Caleb Ferguson# | .3851 | 2015-2026 | |
| 71 | Justin Masterson | .3853 | 2010-2016 | |
| 72 | Santiago Casilla | .3855 | 2005-2017 | |
| 73 | Hector Rondon | .3862 | 2010-2021 | |
| 73 | Chaz Roe | .3862 | 2010-2021 | |
| 75 | C.J. Wilson | .3872 | 2008-2017 | |
| 76 | Neftali Feliz | .3879 | 2010-2018 | |
| 77 | Zac Gallen# | .3882 | 2020-2026 | |
| 77 | Patrick Corbin# | .3882 | 2012-2026 | |
| 77 | Mat Latos | .3882 | 2010-2016 | |
| 80 | Neal Cotts | .3889 | 2005-2016 | |
| 81 | Luis Castillo# | .3890 | 2020-2026 | |
| 82 | Carlos Rodon# | .3892 | 2015-2026 | |
| 83 | Pedro Strop | .3894 | 2011-2021 | |
| 84 | Oliver Perez | .3903 | 2003-2022 | |
| 85 | Dustin May# | .3909 | 2020-2026 | |
| 86 | Kodai Senga# | .3911 | 2023-2026 | |
| 87 | Jerry Blevins | .3916 | 2008-2018 | |
| 88 | David Price | .3918 | 2009-2023 | |
| 88 | Lucas Giolito# | .3918 | 2016-2026 | |
| 90 | Luke Hochevar | .3922 | 2010-2018 | |
| 91 | Chris Sale# | .3923 | 2011-2026 | |
| 92 | Brandon Woodruff# | .3933 | 2015-2026 | |
| 93 | Clayton Kershaw# | .3934 | 2009-2025 | |
| 94 | Sonny Gray# | .3938 | 2012-2026 | |
| 95 | Justin Verlander# | .3940 | 2007-2026 | |
| 95 | Tim Lincecum | .3940 | 2009-2018 | |
| 97 | Brandon Morrow | .3949 | 2009-2020 | |
| 98 | Collin McHugh | .3951 | 2010-2024 | |
| 99 | George Kirby# | .3952 | 2023-2026 | |
| 100 | Koji Uehara | .3955 | 2009-2018 |
