I didn't find anything for this season, but Eddie Rosario had the lowest on-base percentage with 300+ plate appearances in 2024, with an on-base percentage of .215.
Interpreted as:
worst obp by a player with at least 300 plate appearances this regular season| NAME | OBP | PA | SEASON | TM | G | AB | R | H | 2B | 3B | HR | RBI | BB | HBP | SO | SB | CS | TB | XBH | SH | SF | IBB | GIDP | AVG | SLG | OPS | WRC | WRAA | WOBA | WRC+ | BRAA | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 |  | E. Rosario | .215 | 319 | 2024 | TOT | 91 | 297 | 33 | 52 | 12 | 0 | 10 | 35 | 16 | 0 | 77 | 9 | 1 | 94 | 22 | 2 | 4 | 0 | 4 | .175 | .316 | .531 | 17 | -20.5 | .230 | 45 | -21.2 |
| 2 |  | B. Drury | .242 | 360 | 2024 |  LAA | 97 | 325 | 28 | 55 | 7 | 0 | 4 | 15 | 27 | 5 | 81 | 1 | 0 | 74 | 11 | 0 | 3 | 0 | 13 | .169 | .228 | .469 | 15 | -27.1 | .217 | 34 | -27 |
| 3 |  | K. Lee | .244 | 394 | 2024 |  CWS | 125 | 377 | 36 | 79 | 14 | 1 | 12 | 37 | 17 | 0 | 122 | 6 | 3 | 131 | 27 | 0 | 0 | 0 | 12 | .210 | .347 | .591 | 29 | -16.8 | .257 | 64 | -16.3 |
| 4 |  | A. Duvall | .245 | 330 | 2024 |  ATL | 104 | 303 | 29 | 55 | 10 | 0 | 11 | 30 | 21 | 5 | 99 | 0 | 0 | 98 | 21 | 0 | 1 | 0 | 6 | .182 | .323 | .569 | 23 | -15.5 | .252 | 58 | -16.7 |
| 5 |  | T. Estrada | .247 | 381 | 2024 |  SFG | 96 | 364 | 43 | 79 | 15 | 2 | 9 | 47 | 10 | 5 | 76 | 2 | 2 | 125 | 26 | 0 | 2 | 0 | 8 | .217 | .343 | .590 | 28 | -16.5 | .256 | 65 | -16.2 |
| 6 |  | C. Vázquez | .248 | 315 | 2024 |  MIN | 93 | 294 | 29 | 65 | 10 | 0 | 7 | 27 | 11 | 1 | 65 | 3 | 1 | 96 | 17 | 5 | 4 | 0 | 11 | .221 | .327 | .575 | 22 | -15.2 | .250 | 60 | -14.4 |
| 7 |  | M. A. Taylor | .253 | 300 | 2024 |  PIT | 113 | 269 | 35 | 52 | 9 | 1 | 5 | 21 | 23 | 0 | 105 | 12 | 1 | 78 | 15 | 4 | 4 | 0 | 3 | .193 | .290 | .543 | 19 | -16.5 | .242 | 50 | -18 |
| 8 |  | J. Siri | .255 | 446 | 2024 |  TBR | 130 | 402 | 50 | 75 | 16 | 1 | 18 | 47 | 31 | 7 | 170 | 14 | 7 | 147 | 35 | 2 | 4 | 0 | 5 | .187 | .366 | .620 | 38 | -14.1 | .271 | 79 | -10.9 |
| 9 |  | J. Rogers | .255 | 337 | 2024 |  DET | 102 | 310 | 43 | 61 | 16 | 1 | 10 | 36 | 22 | 3 | 99 | 1 | 0 | 109 | 27 | 0 | 2 | 1 | 6 | .197 | .352 | .607 | 27 | -12.5 | .264 | 71 | -11.2 |
| 10 |  | N. Fortes | .259 | 335 | 2024 |  MIA | 110 | 308 | 28 | 70 | 16 | 0 | 4 | 29 | 11 | 4 | 41 | 0 | 1 | 98 | 20 | 7 | 5 | 0 | 6 | .227 | .318 | .577 | 24 | -15.6 | .252 | 57 | -17.2 |
| 11 |  | K. Ruiz | .260 | 485 | 2024 |  WSH | 127 | 459 | 46 | 105 | 21 | 0 | 13 | 57 | 16 | 5 | 54 | 3 | 1 | 165 | 34 | 0 | 5 | 0 | 13 | .229 | .359 | .619 | 40 | -16.3 | .268 | 71 | -17 |
| 12 |  | B. Naylor | .264 | 389 | 2024 |  CLE | 123 | 354 | 39 | 71 | 10 | 2 | 13 | 39 | 29 | 2 | 122 | 6 | 3 | 124 | 25 | 2 | 2 | 1 | 3 | .201 | .350 | .614 | 32 | -13 | .269 | 74 | -11.6 |
| 13 | | M. Moniak | .266 | 418 | 2024 | LAA | 124 | 392 | 48 | 86 | 17 | 2 | 14 | 49 | 21 | 4 | 114 | 8 | 4 | 149 | 33 | 0 | 1 | 0 | 3 | .219 | .380 | .646 | 39 | -10 | .281 | 79 | -9.9 |
| 14 |  | J. Heim | .267 | 491 | 2024 |  TEX | 131 | 459 | 45 | 101 | 12 | 1 | 13 | 59 | 26 | 4 | 90 | 1 | 1 | 154 | 26 | 0 | 2 | 0 | 13 | .220 | .336 | .602 | 40 | -17.8 | .265 | 71 | -16.5 |
| 15 |  | Z. Gelof | .270 | 547 | 2024 |  OAK | 138 | 497 | 60 | 105 | 20 | 2 | 17 | 49 | 38 | 4 | 188 | 25 | 3 | 180 | 39 | 3 | 5 | 0 | 7 | .211 | .362 | .632 | 49 | -14.9 | .276 | 83 | -10.9 |
| 16 | | B. De La Cruz | .271 | 621 | 2024 | TOT | 149 | 584 | 61 | 136 | 25 | 0 | 21 | 68 | 29 | 3 | 170 | 5 | 2 | 224 | 46 | 0 | 5 | 1 | 10 | .233 | .384 | .654 | 59 | -13.8 | .283 | 77 | -16.8 |
| 17 |  | N. Gorman | .271 | 402 | 2024 |  STL | 107 | 365 | 42 | 74 | 15 | 0 | 19 | 50 | 34 | 1 | 151 | 6 | 1 | 146 | 34 | 0 | 2 | 1 | 2 | .203 | .400 | .671 | 41 | -6.4 | .290 | 87 | -6.5 |
| 18 | | O. Arcia | .271 | 602 | 2024 | ATL | 157 | 551 | 50 | 120 | 24 | 0 | 17 | 46 | 41 | 2 | 128 | 2 | 0 | 195 | 41 | 1 | 7 | 1 | 16 | .218 | .354 | .625 | 52 | -18.2 | .273 | 72 | -20.4 |
| 19 |  | MJ Melendez | .273 | 450 | 2024 |  KCR | 135 | 412 | 44 | 85 | 23 | 3 | 17 | 44 | 35 | 3 | 113 | 4 | 4 | 165 | 43 | 0 | 0 | 1 | 3 | .206 | .400 | .674 | 46 | -6.6 | .292 | 84 | -8.1 |
| 20 |  | W. Benson | .274 | 388 | 2024 |  CIN | 128 | 343 | 41 | 64 | 19 | 2 | 14 | 43 | 40 | 2 | 154 | 16 | 7 | 129 | 35 | 1 | 2 | 0 | 3 | .187 | .376 | .650 | 38 | -7.9 | .285 | 75 | -11.6 |
| 21 |  | C. Rafaela | .274 | 571 | 2024 |  BOS | 152 | 544 | 70 | 134 | 23 | 5 | 15 | 75 | 15 | 7 | 151 | 19 | 10 | 212 | 43 | 2 | 3 | 1 | 8 | .246 | .390 | .664 | 56 | -11.1 | .286 | 79 | -13.7 |
| 22 | | P. DeJong | .276 | 482 | 2024 | TOT | 139 | 445 | 54 | 101 | 17 | 0 | 24 | 56 | 23 | 9 | 156 | 2 | 2 | 190 | 41 | 0 | 5 | 0 | 9 | .227 | .427 | .703 | 53 | -3 | .302 | 95 | -2.9 |
| 23 |  | B. Bichette | .277 | 336 | 2024 |  TOR | 81 | 311 | 29 | 70 | 16 | 1 | 4 | 31 | 20 | 3 | 64 | 5 | 1 | 100 | 21 | 0 | 2 | 1 | 12 | .225 | .322 | .598 | 27 | -12.6 | .264 | 71 | -11.3 |
| 24 | | Z. McKinstry | .277 | 325 | 2024 | DET | 118 | 297 | 32 | 64 | 14 | 5 | 4 | 23 | 24 | 2 | 69 | 16 | 0 | 100 | 23 | 0 | 2 | 0 | 3 | .215 | .337 | .614 | 28 | -10.4 | .270 | 75 | -9.2 |
| 25 | | J. DeLuca | .278 | 362 | 2024 | TBR | 107 | 332 | 29 | 72 | 12 | 4 | 6 | 31 | 24 | 4 | 77 | 16 | 6 | 110 | 22 | 2 | 0 | 1 | 1 | .217 | .331 | .609 | 30 | -12 | .269 | 77 | -9.4 |
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