Jonathan India had the best on-base percentage by a rookie in 2021, with an on-base percentage of .376.
Interpreted as:
MLB rookie obp with a minimum of 3.1 PA per team game leader 2021| 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 |  | J. India | .376 | 2021 |  CIN | 150 | 532 | 98 | 143 | 34 | 2 | 21 | 69 | 71 | 23 | 141 | 12 | 3 | 631 | 244 | 57 | 1 | 4 | 1 | 13 | .269 | .459 | .835 | 102 | 25.2 | .363 | 122 | 17.4 |
| 2 |  | R. Arozarena | .356 | 2021 |  TBR | 141 | 529 | 94 | 145 | 32 | 3 | 20 | 69 | 56 | 14 | 170 | 20 | 10 | 604 | 243 | 55 | 0 | 5 | 4 | 9 | .274 | .459 | .815 | 91 | 17.6 | .350 | 128 | 20.4 |
| 3 | | D. Carlson | .343 | 2021 |  STL | 149 | 542 | 79 | 144 | 31 | 4 | 18 | 65 | 57 | 11 | 152 | 2 | 1 | 619 | 237 | 53 | 1 | 8 | 2 | 5 | .266 | .437 | .780 | 86 | 11 | .336 | 112 | 9.3 |
| 4 | | P. Smith | .328 | 2021 |  ARI | 145 | 498 | 68 | 133 | 27 | 4 | 11 | 49 | 42 | 4 | 106 | 1 | 0 | 545 | 201 | 42 | 0 | 1 | 1 | 11 | .267 | .404 | .732 | 68 | 1.7 | .318 | 98 | -1.7 |
| 5 |  | R. Mountcastle | .309 | 2021 |  BAL | 144 | 534 | 77 | 136 | 23 | 1 | 33 | 89 | 41 | 4 | 161 | 4 | 3 | 586 | 260 | 57 | 0 | 7 | 2 | 12 | .255 | .487 | .796 | 81 | 10 | .335 | 111 | 7.8 |
| 6 |  | J. Chisholm Jr. | .303 | 2021 |  MIA | 124 | 464 | 70 | 115 | 20 | 4 | 18 | 53 | 34 | 4 | 145 | 23 | 8 | 507 | 197 | 42 | 2 | 3 | 0 | 3 | .248 | .425 | .728 | 61 | -0.8 | .312 | 94 | -4 |
| 7 |  | A. GarcÃa | .286 | 2021 |  TEX | 149 | 581 | 77 | 141 | 26 | 2 | 31 | 90 | 32 | 5 | 194 | 16 | 5 | 622 | 264 | 59 | 0 | 4 | 0 | 15 | .243 | .454 | .741 | 75 | -0.1 | .314 | 97 | -2.5 |
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