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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Katsuhiko Jouda | .6880 | 2026 | |
| 2 | Norman Kuhn# | .6453 | 2029 | |
| 3 | John Grondin* | .6119 | 2021 | |
| 4 | John Grondin* | .6069 | 2023 | |
| 5 | Norman Kuhn# | .5942 | 2026 | |
| 6 | Gene Reynolds | .5923 | 2021 | |
| 7 | Katsuhiko Jouda | .5913 | 2024 | |
| 8 | John Grondin* | .5895 | 2020 | |
| 9 | Katsuhiko Jouda | .5788 | 2022 | |
| 10 | John Grondin* | .5786 | 2025 | |
| 11 | Norman Kuhn# | .5782 | 2025 | |
| 12 | Tom Taylor# | .5753 | 2031 | |
| 13 | Norman Kuhn# | .5751 | 2028 | |
| 14 | Katsuhiko Jouda | .5750 | 2025 | |
| 15 | Katsuhiko Jouda | .5735 | 2023 | |
| 16 | Norman Kuhn# | .5690 | 2023 | |
| 17 | Thomas Lyons# | .5624 | 2033 | |
| 18 | Norman Kuhn# | .5621 | 2030 | |
| 19 | Norman Kuhn# | .5595 | 2022 | |
| 20 | John Hukill* | .5565 | 2019 | |
| 21 | Timothy Palacio | .5508 | 2015 | |
| 22 | Timothy Palacio | .5482 | 2013 | |
| 23 | John Grondin* | .5471 | 2024 | |
| 24 | John Grondin* | .5451 | 2019 | |
| 25 | Gene Reynolds | .5385 | 2025 | |
| 26 | John Grondin* | .5358 | 2018 | |
| 27 | Iván Castillo | .5350 | 2021 | |
| 28 | John Grondin* | .5276 | 2017 | |
| 29 | Jason Lefebvre | .5274 | 2019 | |
| 30 | Kenneth Lea | .5264 | 2018 | |
| 31 | John Grondin* | .5259 | 2026 | |
| 32 | Andrés Velasco# | .5223 | 2023 | |
| 33 | Ronald Quijada | .5220 | 2024 | |
| 34 | Gene Reynolds | .5160 | 2023 | |
| 35 | George Labarre | .5150 | 2020 | |
| 36 | Jason Lefebvre | .5146 | 2018 | |
| 37 | Jason Lefebvre | .5091 | 2016 | |
| 38 | Timothy Palacio | .5078 | 2019 | |
| 39 | Norman Kuhn# | .5071 | 2024 | |
| 40 | George Labarre | .5035 | 2024 | |
| 41 | Jason Lefebvre | .4990 | 2021 | |
| 42 | George Labarre | .4983 | 2021 | |
| 43 | Gene Reynolds | .4982 | 2027 | |
| 44 | Timothy Palacio | .4973 | 2016 | |
| 45 | Rick Bryant | .4968 | 2027 | |
| 46 | Brett Gerson | .4950 | 2019 | |
| 47 | John Hukill* | .4947 | 2020 | |
| 48 | Duane Gerhardt | .4943 | 2013 | |
| 49 | Gene Reynolds | .4906 | 2024 | |
| 50 | Norman Kuhn# | .4882 | 2027 | |
| 51 | George Labarre | .4879 | 2014 | |
| 52 | Gene Reynolds | .4866 | 2028 | |
| 53 | Winston Satterlee | .4865 | 2017 | |
| 54 | Rick Bryant | .4861 | 2026 | |
| 55 | Luis Cedeño | .4834 | 2019 | |
| 56 | Octavio Cabrales | .4805 | 2020 | |
| 57 | Bill Turek | .4773 | 2016 | |
| 58 | Bill Turek | .4769 | 2014 | |
| 59 | Ronald Quijada | .4768 | 2023 | |
| 60 | Thomas Lyons# | .4759 | 2032 | |
| 61 | Gene Reynolds | .4754 | 2022 | |
| 62 | Carlos Gómez | .4749 | 2027 | |
| 63 | Nathanael Burton | .4744 | 2013 | |
| 64 | Felipe Mendoza | .4716 | 2017 | |
| 65 | Norman Kuhn# | .4715 | 2031 | |
| 66 | Bill O'Neil | .4707 | 2025 | |
| 67 | Albert Peavey | .4703 | 2016 | |
| 68 | Art Whitaker# | .4643 | 2035 | |
| 69 | Miguel Salazar | .4635 | 2020 | |
| 70 | Timothy Palacio | .4632 | 2020 | |
| 71 | Thomas Lyons# | .4629 | 2028 | |
| 72 | Duane Gerhardt | .4617 | 2016 | |
| 73 | John Grondin* | .4613 | 2022 | |
| 74 | Jorge Jaquez | .4608 | 2018 | |
| 75 | Winston Satterlee | .4589 | 2013 | |
| 76 | Imatarou Natsu | .4557 | 2014 | |
| 77 | Brett Gerson | .4545 | 2015 | |
| 78 | Rick Chase# | .4544 | 2032 | |
| 79 | Luis Cedeño | .4538 | 2020 | |
| 80 | Rodrigo Negrón# | .4513 | 2030 | |
| 81 | Timothy Palacio | .4485 | 2014 | |
| 82 | Billy Cremeans | .4461 | 2021 | |
| 83 | Toshinobu Mizutani | .4456 | 2026 | |
| 84 | Jesús Mejía# | .4450 | 2034 | |
| 85 | Santiago Pérez | .4430 | 2027 | |
| 85 | Timothy Mendiola | .4430 | 2016 | |
| 87 | Luis Cedeño | .4420 | 2018 | |
| 88 | Thomas Lyons# | .4417 | 2029 | |
| 89 | Roy Nickerson# | .4410 | 2034 | |
| 90 | Jesús Álvarez | .4405 | 2027 | |
| 91 | Santiago Pérez | .4387 | 2026 | |
| 92 | James Grimes | .4366 | 2013 | |
| 93 | Enrique González# | .4344 | 2028 | |
| 94 | Norman Kuhn# | .4334 | 2035 | |
| 95 | Norman Kuhn# | .4325 | 2034 | |
| 96 | Carlos Madrigal# | .4318 | 2029 | |
| 97 | Esteban Vargas# | .4316 | 2034 | |
| 98 | Gene Reynolds | .4312 | 2026 | |
| 99 | Duane Gerhardt | .4311 | 2014 | |
| 100 | Thomas Lyons# | .4310 | 2030 |
