The Chicago White Stockings had the highest run differential by a team in a season in their first 50 games, with a differential of 275 runs in 1876.
| TEAM | DIFF | SEASON | G | W% | W | L | AB | R | H | 2B | 3B | HR | RBI | BB | HBP | SO | SB | CS | PA | TB | XBH | SH | SF | IBB | GIDP | AVG | OBP | SLG | OPS | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 |  | White Stockings | 275 | 1876 | 50 | .800 | 40 | 10 | 449 | ||||||||||||||||||||||
| 2 |  | Red Stockings | 130 | 1882 | 50 | .680 | 34 | 16 | 319 | ||||||||||||||||||||||
| 3 |  | Americans | 76 | 1901 | 50 | .620 | 31 | 19 | 1,795 | 316 | 516 | 78 | 49 | 15 | 273 | 149 | 21 | 23 | 61 | 1,986 | 737 | 142 | 21 | .287 | .349 | .411 | .760 | ||||
| 4 |  | White Sox | 68 | 1901 | 50 | .600 | 30 | 20 | 1,765 | 332 | 475 | 60 | 13 | 23 | 253 | 194 | 22 | 31 | 110 | 2,015 | 630 | 96 | 34 | .269 | .349 | .357 | .706 | ||||
| 5 |  | Red Caps | 9 | 1876 | 50 | .580 | 29 | 21 | 346 | ||||||||||||||||||||||
| 6 |  | Senators | -4 | 1961 | 50 | .480 | 24 | 26 | 1,652 | 187 | 407 | 73 | 15 | 36 | 179 | 182 | 10 | 271 | 19 | 16 | 1,868 | 618 | 124 | 17 | 7 | 15 | 46 | .246 | .324 | .374 | .698 |
| 7 |  | Tigers | -4 | 1901 | 50 | .540 | 27 | 23 | 1,770 | 297 | 476 | 82 | 31 | 19 | 250 | 151 | 15 | 91 | 81 | 1,974 | 677 | 132 | 38 | .269 | .332 | .382 | .714 | ||||
| 8 |  | Alleghenys | -14 | 1882 | 50 | .440 | 22 | 28 | 271 | ||||||||||||||||||||||
| 9 |  | Marlins | -23 | 1993 | 50 | .420 | 21 | 29 | 1,688 | 180 | 414 | 64 | 8 | 22 | 170 | 191 | 13 | 317 | 41 | 21 | 1,923 | 560 | 94 | 22 | 9 | 13 | 40 | .245 | .325 | .332 | .657 |
| 10 |  | Senators | -23 | 1901 | 50 | .532 | 25 | 22 | 1,744 | 263 | 475 | 69 | 38 | 11 | 216 | 136 | 21 | -66 | 62 | 1,932 | 653 | 118 | 31 | .272 | .332 | .374 | .707 | ||||
| 11 |  | Royals | -25 | 1969 | 50 | .449 | 22 | 27 | 1,711 | 176 | 400 | 66 | 9 | 29 | 161 | 152 | 14 | 278 | 48 | 24 | 1,911 | 571 | 104 | 21 | 13 | 18 | 37 | .234 | .299 | .334 | .633 |
| 12 |  | Devil Rays | -28 | 1998 | 50 | .460 | 23 | 27 | 1,712 | 201 | 457 | 84 | 11 | 41 | 183 | 154 | 15 | 342 | 30 | 25 | 1,915 | 686 | 136 | 23 | 11 | 6 | 41 | .267 | .331 | .401 | .732 |
| 13 |  | Athletics | -28 | 1901 | 50 | .420 | 21 | 29 | 1,803 | 297 | 494 | 86 | 31 | 8 | 239 | 113 | 20 | 43 | 57 | 1,969 | 666 | 125 | 33 | .274 | .324 | .369 | .693 | ||||
| 14 |  | Blue Jays | -34 | 1977 | 50 | .400 | 20 | 30 | 1,671 | 201 | 432 | 79 | 15 | 31 | 178 | 161 | 10 | 239 | 24 | 25 | 1,874 | 634 | 125 | 22 | 10 | 9 | 52 | .259 | .326 | .379 | .705 |
| 15 |  | Colt .45's | -34 | 1962 | 50 | .408 | 20 | 29 | 1,757 | 191 | 429 | 51 | 17 | 40 | 180 | 162 | 14 | 254 | 17 | 14 | 1,964 | 634 | 108 | 20 | 11 | 9 | 43 | .244 | .311 | .361 | .672 |
| 16 |  | Angels | -34 | 1961 | 50 | .380 | 19 | 31 | 1,667 | 204 | 392 | 69 | 4 | 64 | 193 | 207 | 18 | 317 | 5 | 4 | 1,923 | 661 | 137 | 22 | 9 | 12 | 41 | .235 | .325 | .397 | .721 |
| 17 |  | Pilots | -43 | 1969 | 50 | .440 | 22 | 28 | 1,631 | 229 | 388 | 53 | 7 | 49 | 207 | 232 | 14 | 317 | 65 | 22 | 1,907 | 602 | 109 | 23 | 7 | 5 | 38 | .238 | .337 | .369 | .706 |
| 18 |  | Highlanders | -43 | 1903 | 50 | .449 | 22 | 27 | 1,675 | 179 | 378 | 58 | 25 | 5 | 145 | 124 | 22 | 109 | 59 | 1,870 | 501 | 88 | 49 | .226 | .288 | .299 | .587 | ||||
| 19 |  | Blues | -48 | 1901 | 50 | .367 | 18 | 31 | 1,772 | 259 | 500 | 87 | 21 | 5 | 213 | 122 | 14 | 75 | 42 | 1,939 | 644 | 113 | 31 | .282 | .333 | .363 | .697 | ||||
| 20 |  | Atlantics | -51 | 1884 | 50 | .440 | 22 | 28 | 249 | ||||||||||||||||||||||
| 21 |  | Gothams | -55 | 1883 | 50 | .460 | 23 | 27 | 288 | ||||||||||||||||||||||
| 22 |  | Mariners | -62 | 1977 | 50 | .400 | 20 | 30 | 1,690 | 204 | 447 | 72 | 10 | 40 | 196 | 147 | 9 | 213 | 28 | 25 | 1,894 | 659 | 122 | 31 | 17 | 10 | 37 | .264 | .324 | .390 | .714 |
| 23 |  | Brewers | -70 | 1901 | 50 | .367 | 18 | 31 | 1,739 | 265 | 472 | 74 | 27 | 8 | 220 | 130 | 17 | -111 | 79 | 1,928 | 624 | 109 | 42 | .271 | .328 | .359 | .687 | ||||
| 24 |  | Diamondbacks | -74 | 1998 | 50 | .320 | 16 | 34 | 1,673 | 192 | 399 | 72 | 11 | 50 | 180 | 154 | 13 | 386 | 19 | 8 | 1,870 | 643 | 133 | 17 | 13 | 13 | 44 | .238 | .305 | .384 | .690 |
| 25 |  | Padres | -75 | 1969 | 50 | .400 | 20 | 30 | 1,641 | 151 | 360 | 55 | 10 | 30 | 140 | 158 | 11 | 367 | 7 | 15 | 1,834 | 525 | 95 | 19 | 5 | 12 | 36 | .219 | .291 | .320 | .611 |
Some of the information used here was obtained free of charge from Retrosheet.
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