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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | H9 | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Joba Chamberlain | 4.45 | 2007 | |
| 2 | Bob Águila# | 4.52 | 2021 | |
| 3 | Archie Esparza# | 4.62 | 2020 | |
| 4 | António Alonzo | 4.65 | 2008 | |
| 5 | Steve White | 4.76 | 2009 | |
| 6 | Bradley McGuire | 4.97 | 2014 | |
| 7 | Aaron Preston | 5.11 | 2020 | |
| 8 | Carlos Marmol | 5.12 | 2006 | |
| 9 | Roy Williamson# | 5.17 | 2014 | |
| 10 | Alfredo Gómez# | 5.20 | 2023 | |
| 11 | Anderson Fergerson | 5.22 | 2009 | |
| 12 | Jeff Phillips# | 5.34 | 2020 | |
| 13 | Jude Smith | 5.36 | 2014 | |
| 14 | Manny Romero# | 5.40 | 2014 | |
| 15 | Dolf Bergen | 5.41 | 2021 | |
| 16 | Bartolo Rodríguez# | 5.43 | 2022 | |
| 17 | Eddie Wright | 5.48 | 2014 | |
| 17 | Rick Hartman# | 5.48 | 2014 | |
| 19 | Gio Gonzalez | 5.54 | 2007 | |
| 19 | Marcel Vervoort# | 5.54 | 2021 | |
| 19 | Takashi Saito | 5.54 | 2006 | |
| 22 | Craig O'Brien# | 5.57 | 2020 | |
| 23 | Bill Gill# | 5.61 | 2018 | |
| 24 | Michael Thomas# | 5.64 | 2020 | |
| 25 | Dave LaChance# | 5.66 | 2020 | |
| 25 | Marty Allen# | 5.66 | 2020 | |
| 27 | José Domínguez# | 5.71 | 2021 | |
| 28 | Nate Pearson# | 5.75 | 2020 | |
| 29 | Joakim Soria | 5.76 | 2007 | |
| 30 | Pat Nelson# | 5.80 | 2020 | |
| 30 | Kenneth McCaw# | 5.80 | 2024 | |
| 32 | Eddie James# | 5.81 | 2015 | |
| 33 | Bob Frazier# | 5.82 | 2014 | |
| 33 | Sergio Medina# | 5.82 | 2020 | |
| 35 | Tom O'Toole | 5.84 | 2009 | |
| 36 | Luis López# | 5.85 | 2023 | |
| 36 | Steve Hewer | 5.85 | 2006 | |
| 36 | Bob Deeter | 5.85 | 2014 | |
| 39 | Ben Parks# | 5.86 | 2014 | |
| 40 | Kevin Miller# | 5.87 | 2014 | |
| 41 | Roberto Valdéz# | 5.89 | 2022 | |
| 41 | Tony Steward | 5.89 | 2014 | |
| 43 | Dave French | 5.90 | 2014 | |
| 44 | David Stevens | 5.91 | 2014 | |
| 44 | José Domínguez# | 5.91 | 2022 | |
| 44 | Mark Larson | 5.91 | 2020 | |
| 47 | Gabriel Mena# | 5.92 | 2023 | |
| 48 | Roberto Moreno# | 5.93 | 2023 | |
| 48 | Dong-won Im# | 5.93 | 2022 | |
| 50 | Joel Zumaya | 5.94 | 2006 | |
| 51 | Joba Chamberlain | 5.95 | 2006 | |
| 52 | Roland Gates | 5.98 | 2006 | |
| 53 | John Brown | 5.99 | 2020 | |
| 53 | Roland Gates | 5.99 | 2007 | |
| 53 | Dennis Drake | 5.99 | 2020 | |
| 56 | Juan Vega | 6.00 | 2007 | |
| 56 | César Burgos# | 6.00 | 2024 | |
| 58 | Dan Moore | 6.02 | 2014 | |
| 58 | Clayton Kershaw | 6.02 | 2008 | |
| 58 | Mitsuharu Suzuki# | 6.02 | 2021 | |
| 58 | Steve White | 6.02 | 2010 | |
| 62 | Edgar Herrera# | 6.03 | 2024 | |
| 62 | Matt Moore | 6.03 | 2008 | |
| 64 | Bill Moore# | 6.04 | 2014 | |
| 65 | Jeff Phillips# | 6.05 | 2021 | |
| 65 | Atsushi Ito# | 6.05 | 2022 | |
| 67 | Gil Davis# | 6.06 | 2014 | |
| 68 | David Kennedy# | 6.08 | 2019 | |
| 68 | Roland Gates | 6.08 | 2008 | |
| 70 | Steve O'Quinn# | 6.12 | 2023 | |
| 71 | Héctor Luján# | 6.13 | 2014 | |
| 71 | Mark Bebb | 6.13 | 2014 | |
| 73 | Tom O'Toole | 6.14 | 2008 | |
| 73 | Chris Johnson# | 6.14 | 2018 | |
| 75 | Jesse Hayes# | 6.15 | 2014 | |
| 75 | Keith McCoy# | 6.15 | 2014 | |
| 77 | Tommy Bryant | 6.16 | 2008 | |
| 78 | Tanner Bailey | 6.17 | 2014 | |
| 78 | Yovani Gallardo | 6.17 | 2007 | |
| 80 | Jeff McGinnity# | 6.19 | 2020 | |
| 81 | Denis Cornet# | 6.20 | 2022 | |
| 81 | Armando Pérez# | 6.20 | 2018 | |
| 83 | Bosko Radosavijevic# | 6.22 | 2021 | |
| 84 | Ron Bradley | 6.23 | 2019 | |
| 85 | Ted Johnson# | 6.24 | 2014 | |
| 85 | Kyung-wan Park# | 6.24 | 2022 | |
| 85 | Gabriel O'Slattery | 6.24 | 2020 | |
| 88 | Kevin Pryor | 6.25 | 2008 | |
| 89 | Travis Tracy | 6.26 | 2020 | |
| 90 | Clayton Kershaw | 6.29 | 2009 | |
| 90 | Neal Bowers# | 6.29 | 2014 | |
| 92 | Ramón Herrera | 6.30 | 2014 | |
| 93 | Denny Brooks | 6.31 | 2008 | |
| 93 | Anibal Sanchez | 6.31 | 2006 | |
| 95 | José Hernández# | 6.32 | 2019 | |
| 95 | Will Hodges# | 6.32 | 2020 | |
| 97 | David Buchanan | 6.33 | 2020 | |
| 97 | Bruce Porter# | 6.33 | 2018 | |
| 99 | Buddy Mitchell | 6.34 | 2008 | |
| 99 | Rob Armstrong | 6.34 | 2010 |
