Between 1920 and 2000, Ted Williams had the best on-base percentage in a season, with an on-base percentage of .553 in 1941.
| NAME | OBP | SEASON | TM | G | AB | R | H | 2B | 3B | HR | RBI | BB | HBP | SO | SB | CS | PA | TB | XBH | SH | SF | IBB | GIDP | AVG | SLG | OPS | wRC | WRAA | wOBA | wRC+ | BRAA | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 |  | T. Williams | .553 | 1941 | 143 | 456 | 135 | 185 | 33 | 3 | 37 | 120 | 147 | 3 | 27 | 2 | 4 | 606 | 335 | 73 | 0 | 10 | .406 | .735 | 1.287 | 179 | 108.8 | .568 | 221 | 96.9 | |||
| 2 |  | B. Ruth | .545 | 1923 | 152 | 522 | 151 | 205 | 45 | 13 | 41 | 130 | 170 | 4 | 93 | 17 | 21 | 699 | 399 | 99 | 3 | .393 | .764 | 1.309 | 211 | 124.7 | .571 | 230 | 120.4 | ||||
| 3 | | B. Ruth | .532 | 1920 | 142 | 458 | 158 | 172 | 36 | 9 | 54 | 135 | 150 | 3 | 80 | 14 | 14 | 616 | 388 | 99 | 5 | .376 | .847 | 1.379 | 191 | 120.9 | .597 | 237 | 110.5 | ||||
| 4 | | T. Williams | .526 | 1957 | 132 | 420 | 96 | 163 | 28 | 1 | 38 | 87 | 119 | 5 | 43 | 0 | 1 | 546 | 307 | 67 | 0 | 2 | 33 | 11 | .388 | .731 | 1.257 | 148 | 87.3 | .524 | 223 | 79 | |
| 5 | | B. Ruth | .516 | 1926 | 152 | 495 | 139 | 184 | 30 | 5 | 47 | 153 | 144 | 3 | 76 | 11 | 9 | 652 | 365 | 82 | 10 | .372 | .737 | 1.253 | 184 | 105.6 | .551 | 216 | 100.6 | ||||
| 6 | | T. Williams | .513 | 1954 | 117 | 386 | 93 | 133 | 23 | 1 | 29 | 89 | 136 | 1 | 32 | 0 | 0 | 526 | 245 | 53 | 0 | 3 | 10 | .345 | .635 | 1.148 | 131 | 71.1 | .507 | 207 | 65.5 | ||
| 7 | | B. Ruth | .513 | 1924 | 153 | 529 | 143 | 200 | 39 | 7 | 46 | 124 | 142 | 4 | 81 | 9 | 13 | 681 | 391 | 92 | 6 | .378 | .739 | 1.252 | 193 | 109.2 | .549 | 210 | 102 | ||||
| 8 | | B. Ruth | .512 | 1921 | 152 | 540 | 177 | 204 | 44 | 16 | 59 | 168 | 145 | 4 | 81 | 17 | 13 | 693 | 457 | 119 | 4 | .378 | .846 | 1.359 | 214 | 127.8 | .575 | 224 | 118.7 | ||||
| 9 |  | M. Mantle | .512 | 1957 | 144 | 474 | 121 | 173 | 28 | 6 | 34 | 94 | 146 | 0 | 75 | 16 | 3 | 623 | 315 | 68 | 0 | 3 | 23 | 5 | .365 | .665 | 1.177 | 157 | 87.1 | .498 | 217 | 86 | |
| 10 |  | R. Hornsby | .507 | 1924 | 143 | 536 | 121 | 227 | 43 | 14 | 25 | 94 | 89 | 2 | 32 | 5 | 12 | 640 | 373 | 82 | 13 | .424 | .696 | 1.203 | 175 | 96.7 | .537 | 221 | 95.9 | ||||
| 11 | | T. Williams | .499 | 1942 | 150 | 522 | 141 | 186 | 34 | 5 | 36 | 137 | 145 | 4 | 51 | 3 | 2 | 671 | 338 | 75 | 0 | 12 | .356 | .648 | 1.147 | 168 | 96.2 | .524 | 209 | 86.5 | |||
| 12 | | T. Williams | .499 | 1947 | 156 | 528 | 125 | 181 | 40 | 9 | 32 | 114 | 162 | 2 | 47 | 0 | 1 | 693 | 335 | 81 | 1 | 10 | .343 | .634 | 1.133 | 170 | 91.3 | .508 | 207 | 86.2 | |||
| 13 |  | R. Hornsby | .498 | 1928 | 140 | 486 | 99 | 188 | 42 | 7 | 21 | 94 | 107 | 1 | 41 | 5 | 619 | 307 | 70 | 25 | .387 | .632 | 1.130 | 156 | 80.2 | .506 | 196 | 78.1 | |||||
| 14 | | T. Williams | .497 | 1946 | 150 | 514 | 142 | 176 | 37 | 8 | 38 | 123 | 156 | 2 | 44 | 0 | 0 | 672 | 343 | 83 | 0 | 12 | .342 | .667 | 1.164 | 166 | 95.8 | .525 | 214 | 87.5 | |||
| 15 | | T. Williams | .497 | 1948 | 137 | 509 | 124 | 188 | 44 | 3 | 25 | 127 | 126 | 3 | 41 | 4 | 0 | 638 | 313 | 72 | 0 | 10 | .369 | .615 | 1.112 | 156 | 81 | .504 | 184 | 68.8 | |||
| 16 | | B. Ruth | .495 | 1931 | 145 | 534 | 149 | 199 | 31 | 3 | 46 | 162 | 128 | 1 | 51 | 5 | 4 | 663 | 374 | 80 | 0 | .373 | .700 | 1.195 | 181 | 98.6 | .525 | 206 | 95.1 | ||||
| 17 | | B. Ruth | .493 | 1930 | 145 | 518 | 150 | 186 | 28 | 9 | 49 | 153 | 136 | 1 | 61 | 10 | 10 | 676 | 379 | 86 | 21 | .359 | .732 | 1.225 | 192 | 97 | .517 | 204 | 100.6 | ||||
| 18 |  | A. Vaughan | .491 | 1935 | 137 | 499 | 108 | 192 | 34 | 10 | 19 | 99 | 97 | 7 | 18 | 4 | 610 | 303 | 63 | 7 | 5 | .385 | .607 | 1.098 | 151 | 75 | .493 | 194 | 72.7 | ||||
| 19 | | T. Williams | .490 | 1949 | 155 | 566 | 150 | 194 | 39 | 3 | 43 | 159 | 162 | 2 | 48 | 1 | 1 | 730 | 368 | 85 | 0 | 22 | .343 | .650 | 1.141 | 182 | 95.5 | .511 | 187 | 82.2 | |||
| 20 | | B. Ruth | .489 | 1932 | 133 | 457 | 120 | 156 | 13 | 5 | 41 | 137 | 130 | 2 | 62 | 2 | 2 | 589 | 302 | 59 | 0 | .341 | .661 | 1.150 | 153 | 79.1 | .501 | 192 | 75.3 | ||||
| 21 | | R. Hornsby | .489 | 1925 | 138 | 504 | 133 | 203 | 41 | 10 | 39 | 143 | 83 | 2 | 39 | 5 | 3 | 605 | 381 | 90 | 16 | .403 | .756 | 1.245 | 173 | 94.1 | .540 | 208 | 90.1 | ||||
| 22 |  | F. Thomas | .487 | 1994 | 113 | 399 | 106 | 141 | 34 | 1 | 38 | 101 | 109 | 2 | 61 | 2 | 3 | 517 | 291 | 73 | 0 | 7 | 12 | 15 | .353 | .729 | 1.217 | 138 | 72.3 | .499 | 205 | 71.9 | |
| 23 | | N. Cash | .487 | 1961 | 159 | 535 | 119 | 193 | 22 | 8 | 41 | 132 | 124 | 9 | 85 | 11 | 5 | 672 | 354 | 71 | 2 | 2 | 19 | 16 | .361 | .662 | 1.148 | 168 | 88.3 | .488 | 194 | 79.5 | |
| 24 | | B. Ruth | .486 | 1927 | 151 | 540 | 158 | 192 | 29 | 8 | 60 | 165 | 137 | 0 | 89 | 7 | 6 | 691 | 417 | 97 | 14 | .356 | .772 | 1.258 | 195 | 109.9 | .545 | 212 | 104.8 | ||||
| 25 | | T. Speaker | .483 | 1920 | 150 | 552 | 137 | 214 | 50 | 11 | 8 | 107 | 97 | 5 | 13 | 10 | 13 | 674 | 310 | 69 | 20 | .388 | .562 | 1.045 | 152 | 74.9 | .483 | 170 | 62 | ||||
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| NL East | W | L | PCT | GB |
|---|---|---|---|---|
 Braves - y | 94 | 68 | .580 | |
 Phillies - w | 88 | 74 | .543 | 6.0 |
80 | 82 | .494 | 14.0 | |
77 | 85 | .475 | 17.0 | |
74 | 88 | .457 | 20.0 | |
| NL Central | W | L | PCT | GB |
 Brewers - y | 103 | 59 | .636 | |
 Cubs - w | 89 | 73 | .549 | 14.0 |
82 | 80 | .506 | 21.0 | |
77 | 85 | .475 | 26.0 | |
75 | 87 | .463 | 28.0 | |
| NL West | W | L | PCT | GB |
 Dodgers - y | 100 | 62 | .617 | |
 Padres - w | 91 | 71 | .562 | 9.0 |
86 | 76 | .531 | 14.0 | |
65 | 97 | .401 | 35.0 | |
58 | 104 | .358 | 42.0 |
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Nationals
Mets
Pirates
Reds
Diamondbacks
Giants
Rockies| AL East | W | L | PCT | GB |
|---|---|---|---|---|
 Rays - y | 98 | 64 | .605 | |
 Yankees - w | 93 | 68 | .578 | 4.5 |
 Red Sox - w | 87 | 75 | .537 | 11.0 |
79 | 82 | .491 | 18.5 | |
79 | 83 | .488 | 19.0 | |
| AL Central | W | L | PCT | GB |
 Guardians - y | 85 | 77 | .525 | |
 White Sox - w | 84 | 78 | .519 | 1.0 |
77 | 85 | .475 | 8.0 | |
76 | 86 | .469 | 9.0 | |
69 | 93 | .426 | 16.0 | |
| AL West | W | L | PCT | GB |
 Astros - y | 81 | 81 | .500 | |
80 | 82 | .494 | 1.0 | |
76 | 86 | .469 | 5.0 | |
64 | 98 | .395 | 17.0 | |
62 | 100 | .383 | 19.0 |
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