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| Single-Season ERA Leaderboard | |
| * - Indicates Hall of Fame |
| Rank | Player | ERA | IP | Year | Career Leaderboard |
| 1. | Legeron Iseomer * | 1.586 | 261.0 | 2005 | |
| 2. | Gimli Cloudskin | 1.869 | 192.7 | 2011 | |
| 3. | Hallalonn Brilhirion | 1.977 | 277.7 | 2012 | |
| 4. | Boreathor Boraulf * | 2.014 | 263.7 | 2005 | |
| 5. | Legeron Iseomer * | 2.023 | 284.7 | 2006 | |
| 6. | Prilak Hammershaker | 2.082 | 289.7 | 2008 | |
| 7. | Gandogast Fadrier | 2.203 | 253.3 | 2011 | |
| 8. | Boreathor Boraulf * | 2.210 | 281.0 | 2006 | |
| 9. | Frodo Chubb | 2.224 | 287.3 | 2012 | |
| 10. | Mathilda The Sling | 2.287 | 224.3 | 2009 | |
| 11. | Gwomer Grailas | 2.324 | 275.0 | 2012 | |
| 12. | Maggek Footstomper | 2.324 | 213.0 | 2006 | |
| 13. | Todo Sandybanks | 2.328 | 290.0 | 2011 | |
| 14. | Dolok Bonemangler | 2.349 | 264.3 | 2006 | |
| 15. | Prilak Hammershaker | 2.357 | 244.3 | 2009 | |
| 16. | Gwomer Grailas | 2.398 | 244.0 | 2010 | |
| 17. | Prilak Hammershaker | 2.411 | 283.7 | 2007 | |
| 18. | Parin Saphirecryer | 2.424 | 189.3 | 2011 | |
| 19. | Tigor Noseprodder | 2.435 | 207.0 | 2005 | |
| 20. | Todo Sandybanks | 2.442 | 265.3 | 2012 | |
| 21. | Prilak Hammershaker | 2.458 | 241.7 | 2005 | |
| 22. | Nasil Oresplitter | 2.469 | 226.0 | 2007 | |
| 23. | Gwelf Goriborn | 2.474 | 258.3 | 2009 | |
| 24. | Maggek Footstomper | 2.476 | 192.7 | 2005 | |
| 25. | Pimra Gàlas | 2.484 | 221.0 | 2004 | |
| 26. | Tigor Noseprodder | 2.485 | 239.0 | 2006 | |
| 27. | Legeron Iseomer * | 2.507 | 265.7 | 2004 | |
| 28. | Sorrel Amblestar | 2.520 | 289.3 | 2012 | |
| 29. | Boreathor Boraulf * | 2.533 | 302.0 | 2008 | |
| 30. | Gwomer Grailas | 2.540 | 202.0 | 2011 | |
| 31. | Gomli Forgedelver | 2.542 | 205.3 | 2009 | |
| 32. | Prilak Hammershaker | 2.560 | 270.7 | 2006 | |
| 33. | Sjors Cheeseslicer | 2.563 | 256.3 | 2011 | |
| 34. | Frodo Chubb | 2.580 | 254.7 | 2010 | |
| 35. | Fabur Beardcutter | 2.582 | 205.7 | 2006 | |
| 36. | Tanta *stinkblossom | 2.583 | 261.3 | 2006 | |
| 37. | Phanra Fimir | 2.587 | 222.7 | 2011 | |
| 38. | Mathilda The Sling | 2.589 | 170.3 | 2012 | |
| 39. | Hallalonn Brilhirion | 2.597 | 253.0 | 2011 | |
| 40. | Boreathor Boraulf * | 2.623 | 305.3 | 2007 | |
| 41. | Ban Arwodur | 2.625 | 288.0 | 2011 | |
| 42. | Gimli Cloudskin | 2.626 | 195.3 | 2007 | |
| 43. | Libur Irontearer | 2.628 | 226.0 | 2009 | |
| 44. | Gwomer Grailas | 2.629 | 253.3 | 2007 | |
| 45. | Libur Irontearer | 2.631 | 260.0 | 2007 | |
| 46. | Halin Goblinfist | 2.633 | 256.3 | 2006 | |
| 47. | Eralak Bugbearripper | 2.635 | 235.7 | 2007 | |
| 48. | Misil Orebearer | 2.637 | 201.3 | 2009 | |
| 49. | Nuumsh Gnomeraper | 2.649 | 227.7 | 2006 | |
| 50. | Vincent Rogers | 2.662 | 260.3 | 2011 | |
| 51. | Fabur Beardcutter | 2.665 | 233.0 | 2005 | |
| 52. | Mundin Elfplate | 2.692 | 224.0 | 2010 | |
| 53. | James Gilbertson | 2.700 | 223.3 | 2012 | |
| 54. | Geadriel Gamialf | 2.700 | 246.7 | 2009 | |
| 55. | Tonai Nosethrottler | 2.704 | 203.0 | 2009 | |
| 56. | Gwomer Grailas | 2.708 | 216.0 | 2009 | |
| 57. | Tonai Nosethrottler | 2.709 | 212.7 | 2011 | |
| 58. | Ban Arwodur | 2.710 | 262.3 | 2007 | |
| 59. | Vrsol Swordbasher | 2.712 | 225.7 | 2009 | |
| Libur Irontearer | 2.712 | 225.7 | 2006 | ||
| 61. | Torg Shinsnapper | 2.712 | 222.3 | 2010 | |
| 62. | Glosil Foerender | 2.740 | 203.7 | 2007 | |
| 63. | Phanra Fimir | 2.754 | 232.0 | 2010 | |
| 64. | Bugrin Spinner | 2.758 | 218.7 | 2010 | |
| 65. | Todo Sandybanks | 2.768 | 185.3 | 2010 | |
| 66. | Galealbo Elvàwen | 2.768 | 276.3 | 2007 | |
| 67. | Rulina Veslay | 2.769 | 221.0 | 2011 | |
| 68. | Nasil Oresplitter | 2.772 | 201.3 | 2012 | |
| 69. | Tigseen Tal | 2.772 | 188.3 | 2004 | |
| 70. | Libur Irontearer | 2.773 | 220.7 | 2005 | |
| 71. | Gwelf Goriborn | 2.778 | 243.0 | 2008 | |
| 72. | Nuumsh Gnomeraper | 2.779 | 239.7 | 2004 | |
| 73. | Reaver *elfheim | 2.781 | 265.3 | 2012 | |
| 74. | Mathilda The Sling | 2.783 | 207.0 | 2011 | |
| 75. | Borg Axehammer | 2.784 | 171.3 | 2011 | |
| 76. | Grikak Dryadpoker | 2.786 | 252.0 | 2005 | |
| 77. | Dolok Bonemangler | 2.788 | 255.0 | 2009 | |
| 78. | Glosil Foerender | 2.793 | 183.7 | 2010 | |
| 79. | Lugkrish The Wretched | 2.801 | 231.3 | 2012 | |
| 80. | Gwomer Grailas | 2.803 | 244.0 | 2008 | |
| 81. | Vrsuurbag Swordtorturer | 2.804 | 234.3 | 2005 | |
| 82. | Nasil Oresplitter | 2.806 | 298.3 | 2011 | |
| 83. | Wugush Trollthrottler | 2.806 | 221.3 | 2003 | |
| 84. | Tanta *stinkblossom | 2.817 | 284.3 | 2009 | |
| 85. | Vrsol Swordbasher | 2.822 | 229.7 | 2012 | |
| 86. | Gandogast Fadrier | 2.824 | 239.0 | 2009 | |
| 87. | Vrsuurbag Swordtorturer | 2.824 | 267.7 | 2004 | |
| 88. | Torg Shinsnapper | 2.833 | 263.7 | 2008 | |
| 89. | Eralak Bugbearripper | 2.842 | 228.0 | 2006 | |
| Libur Irontearer | 2.842 | 209.0 | 2004 | ||
| 91. | Renato Morales | 2.854 | 198.7 | 2011 | |
| 92. | Elrilmer Elriawyn | 2.864 | 220.0 | 2004 | |
| 93. | Sorrel Amblestar | 2.870 | 269.7 | 2011 | |
| 94. | Ulor Témir | 2.872 | 250.7 | 2006 | |
| 95. | Frodo Chubb | 2.874 | 253.7 | 2008 | |
| 96. | Glodunter Bromburg | 2.883 | 221.7 | 2012 | |
| 97. | Fabur Beardcutter | 2.884 | 224.7 | 2009 | |
| 98. | Prilak Hammershaker | 2.889 | 224.3 | 2011 | |
| 99. | Hallalonn Brilhirion | 2.890 | 227.3 | 2010 | |
| 100. | Eucalypta The Pink | 2.891 | 202.3 | 2011 |
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