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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OOBP | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Mordecai Brown# | .2178 | 1908 | |
| 2 | Ed Walsh# | .2241 | 1908 | |
| 3 | Mordecai Brown# | .2290 | 1909 | |
| 4 | Jose Mendez# | .2368 | 1907 | |
| 5 | Mordecai Brown# | .2373 | 1906 | |
| 6 | Jack Chesbro | .2436 | 1903 | |
| 7 | Addie Joss | .2441 | 1907 | |
| 8 | Ed Walsh# | .2450 | 1910 | |
| 9 | Kid Nichols* | .2465 | 1904 | |
| 10 | Walter Johnson# | .2472 | 1913 | |
| 11 | Addie Joss | .2492 | 1906 | |
| 12 | Harry Howell | .2498 | 1904 | |
| 12 | Jack Pfiester | .2498 | 1906 | |
| 14 | Cy Young | .2502 | 1904 | |
| 15 | Noodles Hahn | .2508 | 1905 | |
| 16 | Addie Joss | .2512 | 1909 | |
| 17 | Addie Joss | .2518 | 1908 | |
| 18 | Harry Howell | .2519 | 1905 | |
| 19 | Gus Weyhing | .2534 | 1888 | |
| 20 | Ed Walsh# | .2538 | 1906 | |
| 21 | Rube Waddell | .2542 | 1904 | |
| 22 | Charles Bender# | .2553 | 1908 | |
| 23 | Jack Chesbro | .2568 | 1905 | |
| 24 | Cy Young | .2575 | 1903 | |
| 25 | Christy Mathewson# | .2584 | 1905 | |
| 26 | Cy Young | .2586 | 1901 | |
| 27 | Rube Vickers | .2592 | 1907 | |
| 28 | Christy Mathewson# | .2596 | 1908 | |
| 29 | Addie Joss | .2602 | 1904 | |
| 30 | Christy Mathewson# | .2603 | 1904 | |
| 31 | Christy Mathewson# | .2612 | 1909 | |
| 32 | Jack Pfiester | .2616 | 1909 | |
| 33 | Charles Bender# | .2623 | 1909 | |
| 34 | Ed Walsh# | .2628 | 1907 | |
| 35 | Tully Sparks | .2631 | 1906 | |
| 36 | Cy Young | .2642 | 1892 | |
| 37 | Howie Camnitz | .2644 | 1910 | |
| 38 | Noodles Hahn | .2646 | 1902 | |
| 39 | Doc White | .2648 | 1905 | |
| 40 | Fred Glade | .2649 | 1904 | |
| 41 | Addie Joss | .2652 | 1903 | |
| 42 | Addie Joss | .2657 | 1905 | |
| 42 | Win Kellum | .2657 | 1905 | |
| 44 | Jack Chesbro | .2660 | 1907 | |
| 45 | Sam Leever | .2666 | 1902 | |
| 46 | Mordecai Brown# | .2669 | 1907 | |
| 47 | Win Kellum | .2674 | 1904 | |
| 48 | Ed Walsh# | .2685 | 1912 | |
| 49 | Kid Nichols* | .2687 | 1905 | |
| 50 | Bob Ewing | .2695 | 1907 | |
| 51 | Howie Camnitz | .2696 | 1908 | |
| 52 | Cy Young | .2699 | 1906 | |
| 53 | Al Orth | .2703 | 1905 | |
| 54 | Joe Williams# | .2707 | 1909 | |
| 55 | Orval Overall | .2710 | 1908 | |
| 56 | Kid Nichols* | .2712 | 1898 | |
| 57 | Addie Joss | .2714 | 1902 | |
| 58 | Norwood Gibson | .2715 | 1904 | |
| 59 | Elmer Steele | .2716 | 1908 | |
| 60 | Frank Smith | .2721 | 1908 | |
| 61 | George Winter | .2723 | 1908 | |
| 62 | Elmer Smith | .2726 | 1888 | |
| 63 | Lefty Leifield# | .2728 | 1907 | |
| 64 | Harry Howell | .2729 | 1908 | |
| 64 | Nick Altrock# | .2729 | 1903 | |
| 64 | Doc White | .2729 | 1906 | |
| 67 | Cy Young | .2730 | 1908 | |
| 67 | Pol Perritt# | .2730 | 1914 | |
| 69 | Tully Sparks | .2733 | 1905 | |
| 70 | Ed Walsh# | .2738 | 1909 | |
| 71 | Dick Rudolph# | .2739 | 1914 | |
| 72 | Barney Wolfe | .2740 | 1904 | |
| 72 | Cy Young | .2740 | 1905 | |
| 72 | Al Maul | .2740 | 1898 | |
| 75 | Orval Overall | .2741 | 1910 | |
| 76 | Bill Bernhard | .2743 | 1905 | |
| 77 | Jack Pfiester | .2744 | 1907 | |
| 78 | Jack Pfiester | .2745 | 1908 | |
| 79 | Hooks Wiltse | .2749 | 1905 | |
| 79 | Dummy Taylor | .2749 | 1904 | |
| 81 | Jose Mendez# | .2750 | 1908 | |
| 82 | Bill Dinneen | .2751 | 1902 | |
| 83 | Christy Mathewson# | .2752 | 1902 | |
| 84 | Babe Adams# | .2753 | 1912 | |
| 85 | Jose Mendez# | .2755 | 1909 | |
| 86 | Bill Dinneen | .2756 | 1905 | |
| 87 | Jake Weimer | .2757 | 1907 | |
| 88 | Ed Reulbach# | .2760 | 1905 | |
| 88 | Deacon Phillippe | .2760 | 1902 | |
| 88 | Red Donahue | .2760 | 1904 | |
| 91 | Otto Hess# | .2764 | 1904 | |
| 92 | Rube Vickers | .2766 | 1908 | |
| 92 | Jesse Tannehill | .2766 | 1905 | |
| 94 | Ed Walsh# | .2768 | 1905 | |
| 95 | Walter Johnson# | .2769 | 1909 | |
| 96 | Cy Young | .2772 | 1902 | |
| 97 | Deacon Phillippe | .2773 | 1901 | |
| 98 | Bob Ewing | .2775 | 1904 | |
| 98 | Joe Williams# | .2775 | 1908 | |
| 100 | Babe Adams# | .2776 | 1914 |
