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| Single-Season Innings Pitched Leaderboard | |
| * - Indicates Hall of Fame |
| Rank | Player | Innings Pitched | IP | Year | Career Leaderboard |
| 1. | Charlie Shields * | 403.0 | 403.0 | 1907 | |
| 2. | Jesse Tannehill * | 401.7 | 401.7 | 1904 | |
| 3. | Roscoe Miller | 397.7 | 397.7 | 1904 | |
| 4. | Walter Johnson * | 394.7 | 394.7 | 1909 | |
| 5. | Jesse Tannehill * | 388.3 | 388.3 | 1905 | |
| 6. | Cy Falkenberg | 386.0 | 386.0 | 1911 | |
| 7. | Ed Killian | 385.3 | 385.3 | 1905 | |
| 8. | Charlie Shields * | 384.7 | 384.7 | 1906 | |
| 9. | Sam Leever | 383.3 | 383.3 | 1902 | |
| 10. | Chief Bender | 382.0 | 382.0 | 1904 | |
| 11. | Cy Falkenberg | 380.3 | 380.3 | 1910 | |
| 12. | Alex Hardy | 380.0 | 380.0 | 1905 | |
| 13. | Rip Vowinkel * | 379.7 | 379.7 | 1911 | |
| 14. | Pete Alexander | 378.7 | 378.7 | 1914 | |
| 15. | Jesse Tannehill * | 378.3 | 378.3 | 1906 | |
| 16. | Joe Wood * | 377.3 | 377.3 | 1917 | |
| 17. | Ray Caldwell | 376.7 | 376.7 | 1918 | |
| Christy Mathewson | 376.7 | 376.7 | 1912 | ||
| 19. | Pete Alexander | 376.0 | 376.0 | 1912 | |
| 20. | Eddie Plank * | 374.7 | 374.7 | 1909 | |
| 21. | Charlie Shields * | 374.3 | 374.3 | 1905 | |
| 22. | John Burke | 374.0 | 374.0 | 1905 | |
| 23. | Ed Kinsella | 373.7 | 373.7 | 1913 | |
| Harry Ables | 373.7 | 373.7 | 1911 | ||
| 25. | Joe Wood * | 373.3 | 373.3 | 1912 | |
| 26. | Gus Thompson | 373.0 | 373.0 | 1904 | |
| 27. | George Merritt * | 372.3 | 372.3 | 1914 | |
| 28. | Christy Mathewson | 372.0 | 372.0 | 1914 | |
| Ed Walsh | 372.0 | 372.0 | 1911 | ||
| 30. | Rube Vickers * | 371.3 | 371.3 | 1913 | |
| Rube Waddell | 371.3 | 371.3 | 1904 | ||
| 32. | Pete Alexander | 371.0 | 371.0 | 1917 | |
| John Burke | 371.0 | 371.0 | 1906 | ||
| 34. | Big Jeff Pfeffer | 370.7 | 370.7 | 1910 | |
| 35. | John Donaldson | 370.0 | 370.0 | 1923 | |
| Pete Alexander | 370.0 | 370.0 | 1915 | ||
| Vive Lindaman | 370.0 | 370.0 | 1906 | ||
| 38. | John Burke | 369.7 | 369.7 | 1907 | |
| 39. | John Frill | 368.7 | 368.7 | 1911 | |
| 40. | Rip Vowinkel * | 368.3 | 368.3 | 1913 | |
| 41. | Joe Boehling | 368.0 | 368.0 | 1918 | |
| Rube Vickers * | 368.0 | 368.0 | 1912 | ||
| Doc White | 368.0 | 368.0 | 1902 | ||
| 44. | Erskine Mayer | 367.3 | 367.3 | 1918 | |
| 45. | Rip Vowinkel * | 367.0 | 367.0 | 1912 | |
| 46. | Eddie Plank * | 366.7 | 366.7 | 1908 | |
| Ham Iburg | 366.7 | 366.7 | 1906 | ||
| Noodles Hahn | 366.7 | 366.7 | 1901 | ||
| 49. | Erskine Mayer | 366.3 | 366.3 | 1917 | |
| 50. | Chief Bender | 366.0 | 366.0 | 1918 | |
| Dummy Deegan | 366.0 | 366.0 | 1906 | ||
| 52. | Smokey Joe Williams | 365.7 | 365.7 | 1917 | |
| Joe Wood * | 365.7 | 365.7 | 1914 | ||
| Jimmy Dygert | 365.7 | 365.7 | 1907 | ||
| Eddie Plank * | 365.7 | 365.7 | 1904 | ||
| 56. | Tom Hughes | 364.7 | 364.7 | 1915 | |
| 57. | Lefty Grove | 364.3 | 364.3 | 1928 | |
| Dutch Leonard | 364.3 | 364.3 | 1917 | ||
| Ed Kinsella | 364.3 | 364.3 | 1911 | ||
| Dummy Deegan | 364.3 | 364.3 | 1905 | ||
| Ed Killian | 364.3 | 364.3 | 1904 | ||
| 62. | Rip Vowinkel * | 364.0 | 364.0 | 1914 | |
| Jake Boultes | 364.0 | 364.0 | 1911 | ||
| 64. | Rube Kroh | 363.7 | 363.7 | 1914 | |
| Bob Dresser | 363.7 | 363.7 | 1905 | ||
| 66. | Big Jeff Pfeffer | 363.3 | 363.3 | 1908 | |
| Walter Clarkson | 363.3 | 363.3 | 1905 | ||
| 68. | Joe Wood * | 363.0 | 363.0 | 1913 | |
| Ralph Caldwell * | 363.0 | 363.0 | 1912 | ||
| Walter Johnson * | 363.0 | 363.0 | 1910 | ||
| 71. | Joe Wood * | 362.7 | 362.7 | 1915 | |
| Bob Dresser | 362.7 | 362.7 | 1911 | ||
| 73. | Jim Bagby | 362.3 | 362.3 | 1917 | |
| Alex Hardy | 362.3 | 362.3 | 1910 | ||
| Ralph Caldwell * | 362.3 | 362.3 | 1909 | ||
| Cy Falkenberg | 362.3 | 362.3 | 1906 | ||
| 77. | Rube Kroh | 362.0 | 362.0 | 1912 | |
| Big Jeff Pfeffer | 362.0 | 362.0 | 1909 | ||
| 79. | George Ferguson | 361.7 | 361.7 | 1916 | |
| Chief Bender | 361.7 | 361.7 | 1909 | ||
| Charlie Shields * | 361.7 | 361.7 | 1908 | ||
| John Burke | 361.7 | 361.7 | 1904 | ||
| 83. | Fred Glade | 361.3 | 361.3 | 1906 | |
| 84. | Dutch Leonard | 361.0 | 361.0 | 1916 | |
| Ed Siever | 361.0 | 361.0 | 1904 | ||
| 86. | Ted Radcliffe | 360.7 | 360.7 | 1928 | |
| Ray Caldwell | 360.7 | 360.7 | 1917 | ||
| Eddie Plank * | 360.7 | 360.7 | 1906 | ||
| 89. | Irv Young | 360.3 | 360.3 | 1906 | |
| 90. | Ed Kinsella | 360.0 | 360.0 | 1912 | |
| 91. | Ed Walsh | 359.7 | 359.7 | 1909 | |
| Chief Bender | 359.7 | 359.7 | 1908 | ||
| 93. | Jim Brillheart | 359.3 | 359.3 | 1928 | |
| George Ferguson | 359.3 | 359.3 | 1917 | ||
| Walter Johnson * | 359.3 | 359.3 | 1915 | ||
| Mordecai Brown | 359.3 | 359.3 | 1908 | ||
| Chief Bender | 359.3 | 359.3 | 1905 | ||
| 98. | Jimmy Dygert | 359.0 | 359.0 | 1908 | |
| 99. | Joe Rogan | 358.7 | 358.7 | 1918 | |
| Ralph Caldwell * | 358.7 | 358.7 | 1911 |
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