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| First Basemen Single-Season On-Base Pct Leaderboard | |
| * - Indicates Hall of Fame
+ - indicates hit-less at-bats added to meet 502PA requirement. |
| Rank | Player | On-Base Pct | PA | Year | Career Leaderboard |
| 1. | Arweogast Belaraviel * | .4448 | 679 | 2003 | |
| 2. | Arweogast Belaraviel * | .4303 | 667 | 2004 | |
| 3. | Tavoja Legindil | .4188 | 543 | 2003 | |
| 4. | Tavoja Legindil | .4141 | 623 | 2005 | |
| 5. | Arweogast Belaraviel * | .4127 | 693 | 2005 | |
| 6. | Tavoja Legindil | .4108 | 706 | 2004 | |
| 7. | Galeoman Elvér | .4076 | 631 | 2006 | |
| 8. | Tavlla Legilmaldor | .4056 | 646 | 2003 | |
| 9. | Sean Radigast | .4052 | 651 | 2003 | |
| 10. | Ceonvan Fleam | .4047 | 688 | 2007 | |
| 11. | Inadorn Tovar | .3967 | 658 | 2012 | |
| 12. | Ceonvan Fleam | .3960 | 657 | 2006 | |
| 13. | Galeoman Elvér | .3934 | 638 | 2007 | |
| 14. | Ceonvan Fleam | .3927 | 578 | 2010 | |
| 15. | Arweogast Belaraviel * | .3923 | 701 | 2006 | |
| 16. | Golligast Gandulbo | .3923 | 673 | 2009 | |
| 17. | Golligast Gandulbo | .3920 | 671 | 2007 | |
| 18. | Arweogast Belaraviel * | .3896 | 652 | 2008 | |
| 19. | Vonus Tunnelsmelter | .3873 | 575 | 2003 | |
| 20. | Razrhot The Smasher | .3846 | 650 | 2011 | |
| 21. | Ceonvan Fleam | .3838 | 645 | 2009 | |
| 22. | Galogorn Elvol | .3834 | 600 | 2008 | |
| 23. | Gandaugrin Gamaiborn | .3815 | 595 | 2007 | |
| 24. | Sprig Swordsmith | .3803 | 542 | 2010 | |
| 25. | Issah Elanduil | .3800+ | 491 | 2005 | |
| 26. | Lasil Ironmaster | .3795 | 701 | 2004 | |
| 27. | Elruden Elraralindë | .3780 | 508 | 2003 | |
| 28. | Imredoc Gwildur | .3770 | 672 | 2008 | |
| 29. | Arweogast Belaraviel * | .3767 | 661 | 2007 | |
| 30. | Gollilman Garon | .3767 | 669 | 2004 | |
| 31. | Firbal The Nasty | .3765 | 664 | 2012 | |
| 32. | Sprig Swordsmith | .3765 | 610 | 2008 | |
| 33. | Savia Gàril | .3764 | 518 | 2009 | |
| 34. | Vonus Tunnelsmelter | .3761 | 570 | 2004 | |
| 35. | Glognar Foebinder | .3760 | 615 | 2003 | |
| 36. | Sean Radigast | .3760 | 618 | 2004 | |
| 37. | Hafur Goblincrusher | .3756 | 607 | 2003 | |
| 38. | Ceonvan Fleam | .3752 | 605 | 2011 | |
| 39. | Lasil Ironmaster | .3742 | 652 | 2005 | |
| 40. | Cinquefoil Boartooth | .3736 | 621 | 2009 | |
| 41. | Gandaugrin Gamaiborn | .3734 | 640 | 2010 | |
| 42. | Savia Gàril | .3734 | 618 | 2010 | |
| 43. | Goinus Forgearm | .3733 | 512 | 2007 | |
| 44. | Razrhot The Smasher | .3733 | 651 | 2006 | |
| 45. | Issah Elanduil | .3733+ | 474 | 2004 | |
| 46. | Elruden Elraralindë | .3705+ | 481 | 2004 | |
| 47. | Glognar Foebinder | .3695 | 590 | 2004 | |
| 48. | Lasil Ironmaster | .3689 | 740 | 2003 | |
| 49. | Galeoman Elvér | .3685 | 638 | 2005 | |
| 50. | Firbal The Nasty | .3683 | 676 | 2010 | |
| 51. | Alberto Guillen | .3678 | 610 | 2011 | |
| 52. | Sprig Swordsmith | .3675 | 529 | 2011 | |
| 53. | Inadorn Tovar | .3672 | 580 | 2011 | |
| 54. | Tavlla Legilmaldor | .3670 | 643 | 2006 | |
| 55. | Gandaugrin Gamaiborn | .3660 | 664 | 2012 | |
| 56. | Tavlla Legilmaldor | .3657 | 659 | 2007 | |
| 57. | Alberto Guillen | .3654 | 614 | 2012 | |
| 58. | Elrealob Elrauhil | .3653 | 657 | 2005 | |
| 59. | Golligast Gandulbo | .3642 | 649 | 2012 | |
| 60. | Gandaugrin Gamaiborn | .3638 | 635 | 2009 | |
| 61. | Lasil Ironmaster | .3638 | 668 | 2006 | |
| 62. | Cinquefoil Boartooth | .3623 | 610 | 2012 | |
| 63. | Galaigast Faromli | .3618 | 691 | 2008 | |
| 64. | Elrealob Elrauhil | .3610 | 687 | 2004 | |
| 65. | Dennis Hernandez | .3609 | 640 | 2008 | |
| 66. | Myrtai Elvywyn | .3604 | 627 | 2004 | |
| 67. | Ruzdreg The Basher | .3595 | 587 | 2008 | |
| 68. | Issah Elanduil | .3583+ | 462 | 2003 | |
| 69. | Tavlla Legilmaldor | .3581 | 620 | 2005 | |
| 70. | Imredoc Gwildur | .3575 | 649 | 2012 | |
| 71. | Ceonvan Fleam | .3562 | 616 | 2012 | |
| 72. | Golligast Gandulbo | .3559 | 680 | 2008 | |
| 73. | Phaiseen Fambor | .3555 | 633 | 2003 | |
| 74. | Imredoc Gwildur | .3549 | 666 | 2010 | |
| 75. | Inadorn Tovar | .3548 | 544 | 2010 | |
| 76. | Myrtai Elvywyn | .3546 | 612 | 2003 | |
| 77. | Hafur Goblincrusher | .3538 | 636 | 2004 | |
| 78. | Ruzdreg The Basher | .3526 | 555 | 2010 | |
| 79. | Clarence Pender | .3523 | 689 | 2012 | |
| 80. | Bill Pelham | .3516 | 546 | 2011 | |
| 81. | Cinquefoil Boartooth | .3516 | 620 | 2008 | |
| 82. | Firbal The Nasty | .3515 | 680 | 2011 | |
| 83. | Vatok Thräthien | .3513 | 612 | 2003 | |
| 84. | Razrhot The Smasher | .3512 | 635 | 2007 | |
| 85. | Orgulas Black | .3511 | 618 | 2011 | |
| 86. | Srunk Mandragger | .3506+ | 488 | 2010 | |
| 87. | Ruzdreg The Basher | .3505 | 623 | 2009 | |
| 88. | Issah Elanduil | .3485 | 536 | 2006 | |
| 89. | Binus Anvilworker | .3483 | 623 | 2005 | |
| 90. | Ceonvan Fleam | .3483 | 606 | 2008 | |
| 91. | Vatok Thräthien | .3482 | 626 | 2004 | |
| 92. | Bifur Thunderarrow | .3471 | 582 | 2009 | |
| 93. | Gandaugrin Gamaiborn | .3470 | 585 | 2011 | |
| 94. | Myrtai Elvywyn | .3462 | 621 | 2006 | |
| 95. | Razrhot The Smasher | .3459 | 636 | 2012 | |
| 96. | Fosco Bramble | .3456 | 599 | 2012 | |
| 97. | Galaigast Faromli | .3455 | 658 | 2010 | |
| 98. | Hafur Goblincrusher | .3452 | 588 | 2010 | |
| 99. | Purk Humanraper | .3441 | 526 | 2003 | |
| 100. | Galeoman Elvér | .3438 | 635 | 2008 |
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