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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OBP | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | George Hatfield | .5426 | 1940 | |
| 2 | Chris Godfrey | .5161 | 1946 | |
| 3 | Chris Godfrey | .5109 | 1944 | |
| 4 | George Hatfield | .5085 | 1941 | |
| 5 | Alfredo Fajardo | .5045 | 1931 | |
| 6 | Alfredo Fajardo | .5038 | 1932 | |
| 7 | Jing-zhong Zhào | .5028 | 1917 | |
| 8 | Rodrigo Puente | .5000 | 1940 | |
| 8 | Lorenzo Gonzáles# | .5000 | 1982 | |
| 10 | Conner McKnight | .4948 | 1945 | |
| 11 | Stanley King | .4894 | 1944 | |
| 12 | Jeff Wagner | .4892 | 1937 | |
| 13 | Lane Smith | .4871 | 1929 | |
| 14 | Tim Murdock | .4848 | 1928 | |
| 15 | Rodrigo Puente | .4791 | 1942 | |
| 16 | Gary Lazarus | .4790 | 1926 | |
| 17 | Pedro Ramírez | .4764 | 1945 | |
| 18 | Juan Piña | .4762 | 1944 | |
| 19 | Joe Padgett | .4760 | 1939 | |
| 20 | Fernando Colón | .4722 | 1939 | |
| 21 | Fernando Colón | .4706 | 1940 | |
| 22 | Rob Weaver | .4701 | 1932 | |
| 23 | Miguel Angel Torres | .4698 | 1940 | |
| 24 | Tim Murdock | .4643 | 1931 | |
| 25 | Nick Duke | .4631 | 1938 | |
| 26 | Tim Murdock | .4615 | 1930 | |
| 27 | Jason Foster | .4599 | 1943 | |
| 28 | Clayton Meyer | .4591 | 1933 | |
| 29 | Jeffrey Jenkins | .4590 | 1944 | |
| 30 | Alfredo Fajardo | .4571 | 1933 | |
| 31 | Maximino Albertoni | .4556 | 1938 | |
| 32 | William O'Herlihy | .4545 | 1922 | |
| 33 | Jiao-long Hsia | .4537 | 1936 | |
| 34 | Kevin Keller | .4535 | 1939 | |
| 35 | Chris Godfrey | .4534 | 1945 | |
| 36 | Henry Quenby | .4532 | 1941 | |
| 37 | Greg Porter | .4531 | 1939 | |
| 38 | Jeremy Chase | .4529 | 1927 | |
| 39 | Pedro Ramírez | .4521 | 1946 | |
| 40 | Tim Murdock | .4505 | 1929 | |
| 41 | Beco Tatonio | .4495 | 1925 | |
| 42 | Francisco Maldonado | .4486 | 1933 | |
| 43 | Henry Chandler | .4480 | 1928 | |
| 44 | William O'Herlihy | .4473 | 1924 | |
| 45 | Fernando Colón | .4459 | 1938 | |
| 46 | Francisco Maldonado | .4458 | 1932 | |
| 47 | Bill Murdock | .4455 | 1937 | |
| 48 | George Hatfield | .4453 | 1943 | |
| 49 | Miguel Angel Torres | .4439 | 1941 | |
| 50 | Conner McKnight | .4435 | 1947 | |
| 51 | Aaron MacKinney | .4413 | 1933 | |
| 52 | Manny Chacón | .4412 | 1947 | |
| 53 | Fernando Colón | .4406 | 1941 | |
| 54 | George Hatfield | .4405 | 1942 | |
| 55 | Miguel Longoria | .4398 | 1911 | |
| 56 | Lane Smith | .4397 | 1930 | |
| 57 | Martin Pryor | .4395 | 1941 | |
| 57 | Pedro Ramírez | .4395 | 1943 | |
| 57 | Joe Reed | .4395 | 1926 | |
| 60 | Henry Chandler | .4387 | 1929 | |
| 61 | Juan Piña | .4385 | 1946 | |
| 62 | Ben Wearne | .4380 | 1942 | |
| 63 | Chris Godfrey | .4368 | 1947 | |
| 64 | Joaquín Velásquez | .4364 | 1930 | |
| 64 | Kevin Keller | .4364 | 1936 | |
| 64 | Clayton Meyer | .4364 | 1934 | |
| 67 | Robert Palmer | .4358 | 1920 | |
| 68 | Roberto Castillo | .4348 | 1947 | |
| 69 | Kevin Keller | .4342 | 1938 | |
| 70 | Juan Ramírez | .4329 | 1931 | |
| 71 | Rodrigo Puente | .4328 | 1941 | |
| 72 | Casper van Doorn | .4327 | 1939 | |
| 73 | William O'Herlihy | .4326 | 1923 | |
| 73 | Pedro Ramírez | .4326 | 1944 | |
| 75 | Marcus Wallace | .4324 | 1934 | |
| 76 | Jeffrey Jenkins | .4323 | 1945 | |
| 77 | Jeff Wagner | .4309 | 1938 | |
| 78 | Robinson Román | .4304 | 1923 | |
| 79 | Héctor Madrigal | .4286 | 1934 | |
| 79 | Joe Reed | .4286 | 1925 | |
| 79 | Raúl Alba | .4286 | 1932 | |
| 82 | Gary Lazarus | .4280 | 1928 | |
| 83 | Joe Green | .4277 | 1940 | |
| 84 | Beco Tatonio | .4265 | 1924 | |
| 85 | Bill Murdock | .4259 | 1936 | |
| 86 | Francisco Maldonado | .4256 | 1930 | |
| 87 | Maximino Albertoni | .4251 | 1937 | |
| 88 | Juan Ramírez | .4246 | 1930 | |
| 89 | Jorge Colón | .4234 | 1933 | |
| 90 | Juan Piña | .4229 | 1945 | |
| 91 | Kieran Vyse | .4219 | 1930 | |
| 92 | Lee Elliott | .4216 | 1936 | |
| 93 | Kevin Keller | .4213 | 1937 | |
| 93 | Robinson Román | .4213 | 1924 | |
| 93 | Clayton Meyer | .4213 | 1935 | |
| 96 | Leonard Taylor# | .4204 | 1982 | |
| 97 | Miguel Angel Torres | .4198 | 1943 | |
| 97 | Shi-kai Jiu | .4198 | 1920 | |
| 99 | Bryant Thomas | .4190 | 1943 | |
| 100 | José Galló | .4188 | 1928 |
