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| First Basemen Single-Season Slugging Pct Leaderboard | |
| * - Indicates Hall of Fame
+ - indicates hit-less at-bats added to meet 502PA requirement. |
| Rank | Player | Slugging Pct | PA | Year | Career Leaderboard |
| 1. | Jimmie Davis * | .7107 | 700 | 2000 | |
| 2. | Jimmie Davis * | .6609 | 713 | 2001 | |
| 3. | John Gleaves | .6339 | 507 | 2019 | |
| 4. | Hal Rehm | .6020 | 677 | 2018 | |
| 5. | Hal Rehm | .5933 | 642 | 2015 | |
| 6. | John Gleaves | .5895 | 659 | 2016 | |
| 7. | Hank Carruthers | .5889 | 665 | 2026 | |
| 8. | Bick Horizon | .5729 | 630 | 2011 | |
| 9. | Bick Horizon | .5670 | 629 | 2010 | |
| 10. | John Gleaves | .5660 | 656 | 2014 | |
| 11. | Aragorn King * | .5589 | 646 | 2005 | |
| 12. | Ron Brenton | .5525 | 704 | 2001 | |
| 13. | Aragorn King * | .5490 | 619 | 2006 | |
| 14. | Hank Carruthers | .5472 | 661 | 2029 | |
| 15. | Hank Carruthers | .5456 | 648 | 2028 | |
| 16. | Ron Brenton | .5419 | 635 | 2008 | |
| 17. | Jimmie Davis * | .5390 | 641 | 2002 | |
| 18. | Leonardo De La Rosa | .5382 | 663 | 2029 | |
| 19. | Renaldo Loera | .5292 | 652 | 2003 | |
| 20. | Richard Willie | .5280 | 593 | 2009 | |
| 21. | Elmo Miles | .5278 | 546 | 2001 | |
| 22. | John Gleaves | .5230 | 570 | 2012 | |
| 23. | Aragorn King * | .5223 | 631 | 2009 | |
| 24. | Aragorn King * | .5223 | 644 | 2007 | |
| 25. | Albert Ortega | .5218 | 519 | 2003 | |
| 26. | Luis Rodriguez | .5218 | 647 | 2024 | |
| 27. | Hal Rehm | .5194 | 704 | 2019 | |
| 28. | Luis Rodriguez | .5175 | 530 | 2025 | |
| 29. | Jarvis Holeman | .5169 | 530 | 2015 | |
| 30. | Paul Sidgwick | .5162 | 653 | 2026 | |
| 31. | John Gleaves | .5149 | 646 | 2017 | |
| 32. | Jeff Giles | .5148 | 510 | 2027 | |
| 33. | Leon Brouwer | .5146 | 608 | 2008 | |
| 34. | Chubby Arnette | .5143 | 577 | 2027 | |
| 35. | Paul Sidgwick | .5136 | 665 | 2022 | |
| 36. | Ron Brenton | .5115 | 654 | 2006 | |
| 37. | Xever Sedillo | .5108 | 648 | 2029 | |
| 38. | Aragorn King * | .5107 | 615 | 2004 | |
| 39. | Hank Carruthers | .5099 | 645 | 2023 | |
| 40. | Mike King | .5089 | 623 | 2021 | |
| 41. | Leon Brouwer | .5087 | 504 | 2010 | |
| 42. | Paco Andujar | .5086 | 646 | 2014 | |
| 43. | Renaldo Loera | .5068 | 646 | 2006 | |
| 44. | Ed Abrams | .5062 | 652 | 2021 | |
| 45. | Renaldo Loera | .5041 | 702 | 2001 | |
| 46. | John Gleaves | .5036 | 652 | 2015 | |
| 47. | Paul Sidgwick | .5034 | 670 | 2028 | |
| 48. | Renaldo Loera | .5034 | 664 | 2002 | |
| 49. | John Gleaves | .5027 | 676 | 2018 | |
| 50. | Paul Sidgwick | .5026 | 647 | 2029 | |
| 51. | Cole Watterson | .5020 | 566 | 2023 | |
| 52. | Chubby Arnette | .5018 | 601 | 2028 | |
| 53. | Renaldo Loera | .5016 | 685 | 2000 | |
| 54. | Ron Brenton | .5009 | 635 | 2005 | |
| 55. | Nobukazu Takemura | .5000 | 626 | 2014 | |
| 56. | William McCroskey | .4992 | 681 | 2023 | |
| 57. | Luis Rodriguez | .4983 | 653 | 2019 | |
| 58. | Ron Brenton | .4982 | 643 | 2004 | |
| 59. | Ron Brenton | .4957 | 691 | 2000 | |
| 60. | Mike King | .4947 | 618 | 2018 | |
| 61. | Hal Rehm | .4944 | 691 | 2020 | |
| 62. | Chubby Arnette | .4936 | 603 | 2025 | |
| 63. | Antonio Herrera | .4936 | 553 | 2001 | |
| 64. | Antonio Herrera | .4930 | 591 | 2008 | |
| 65. | Mohammed Cardenas | .4917 | 606 | 2003 | |
| 66. | Antonio Herrera | .4915 | 614 | 2007 | |
| 67. | Johnny Carmona | .4910 | 633 | 2013 | |
| 68. | Ed Abrams | .4909 | 662 | 2022 | |
| 69. | Hugo Grimm | .4892 | 708 | 2000 | |
| 70. | Aragorn King * | .4887 | 574 | 2010 | |
| 71. | Leonardo De La Rosa | .4885 | 659 | 2028 | |
| 72. | Antonio Herrera | .4883 | 610 | 2002 | |
| 73. | Johnny Carmona | .4871 | 622 | 2012 | |
| 74. | Bick Horizon | .4867 | 550 | 2008 | |
| 75. | Jarvis Holeman | .4865 | 632 | 2017 | |
| 76. | Cole Watterson | .4861+ | 492 | 2028 | |
| 77. | Isaac Coulter | .4847 | 547 | 2001 | |
| 78. | Howard Lovecraft | .4845 | 572 | 2012 | |
| 79. | John Gleaves | .4841 | 602 | 2011 | |
| 80. | Jason Wallin | .4839 | 636 | 2012 | |
| 81. | Luis Rodriguez | .4832 | 640 | 2027 | |
| 82. | Jimmie Davis * | .4831 | 644 | 2003 | |
| 83. | Aragorn King * | .4826 | 627 | 2012 | |
| 84. | Antonio Herrera | .4826 | 655 | 2000 | |
| 85. | Jarvis Holeman | .4821 | 644 | 2016 | |
| 86. | Johnny Carmona | .4819 | 592 | 2011 | |
| 87. | Jason Wallin | .4814 | 638 | 2014 | |
| 88. | Renaldo Loera | .4811 | 671 | 2004 | |
| 89. | James Roselli | .4811 | 532 | 2000 | |
| 90. | Richard Willie | .4806 | 564 | 2006 | |
| 91. | Jarvis Holeman | .4805 | 720 | 2014 | |
| 92. | Ernie Lester | .4802 | 514 | 2029 | |
| 93. | Thad Hambro | .4797 | 700 | 2029 | |
| 94. | Pat Galyon | .4795 | 569 | 2006 | |
| 95. | Dean Chalmers | .4792 | 629 | 2017 | |
| 96. | Mark Edgin | .4789 | 568 | 2001 | |
| 97. | Bick Horizon | .4786 | 611 | 2009 | |
| 98. | Mark Edgin | .4784 | 549 | 2000 | |
| 99. | Luis Rodriguez | .4784 | 637 | 2021 | |
| 100. | James Persons | .4781 | 507 | 2001 |
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