30 teams are tied for the worst record with a run differential of exactly 1 in a season, with a record of 15-0 this season. The first three are the St. Louis Cardinals, the Athletics and the Minnesota Twins.
| TEAM | REC | DIFF | SEASON | W% | G | 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 |  | Cardinals | 15-0 | 15 | 2025 | 1.000 | 15 | 15 | 0 | 478 | 67 | 115 | 17 | 1 | 14 | 66 | 46 | 9 | 105 | 5 | 4 | 542 | 176 | 32 | 2 | 7 | 4 | 7 | .241 | .315 | .368 | .683 |
| 2 |  | Athletics | 10-0 | 10 | 2025 | 1.000 | 10 | 10 | 0 | 345 | 42 | 96 | 18 | 2 | 8 | 40 | 26 | 2 | 92 | 7 | 2 | 380 | 142 | 28 | 3 | 4 | 2 | 8 | .278 | .329 | .412 | .741 |
| 3 |  | Twins | 10-0 | 10 | 2025 | 1.000 | 10 | 10 | 0 | 343 | 45 | 93 | 15 | 1 | 9 | 45 | 29 | 6 | 85 | 6 | 4 | 382 | 137 | 25 | 1 | 3 | 2 | 5 | .271 | .336 | .399 | .735 |
| 4 |  | Braves | 11-0 | 11 | 2025 | 1.000 | 11 | 11 | 0 | 384 | 50 | 101 | 14 | 2 | 15 | 48 | 43 | 5 | 87 | 10 | 1 | 440 | 164 | 31 | 3 | 5 | 5 | 11 | .263 | .341 | .427 | .768 |
| 5 |  | White Sox | 6-0 | 6 | 2025 | 1.000 | 6 | 6 | 0 | 180 | 16 | 44 | 7 | 0 | 3 | 16 | 22 | 2 | 43 | 5 | 0 | 208 | 60 | 10 | 3 | 1 | 1 | 6 | .244 | .332 | .333 | .665 |
| 6 |  | Orioles | 11-0 | 11 | 2025 | 1.000 | 11 | 11 | 0 | 343 | 39 | 77 | 13 | 2 | 12 | 37 | 28 | 4 | 96 | 10 | 3 | 377 | 130 | 27 | 0 | 2 | 1 | 8 | .224 | .289 | .379 | .668 |
| 7 |  | Yankees | 12-0 | 12 | 2025 | 1.000 | 12 | 12 | 0 | 377 | 34 | 74 | 16 | 2 | 13 | 33 | 43 | 3 | 113 | 3 | 3 | 428 | 133 | 31 | 2 | 3 | 6 | 5 | .196 | .282 | .353 | .634 |
| 8 |  | Blue Jays | 15-0 | 15 | 2025 | 1.000 | 15 | 15 | 0 | 539 | 75 | 147 | 24 | 2 | 19 | 71 | 41 | 5 | 83 | 4 | 2 | 595 | 232 | 45 | 6 | 4 | 8 | 13 | .273 | .328 | .430 | .758 |
| 9 |  | Guardians | 10-0 | 10 | 2025 | 1.000 | 10 | 10 | 0 | 313 | 36 | 68 | 10 | 1 | 8 | 34 | 42 | 5 | 76 | 11 | 4 | 365 | 104 | 19 | 2 | 3 | 3 | 5 | .217 | .317 | .332 | .649 |
| 10 |  | Red Sox | 9-0 | 9 | 2025 | 1.000 | 9 | 9 | 0 | 296 | 37 | 67 | 19 | 0 | 12 | 34 | 38 | 7 | 70 | 8 | 6 | 343 | 122 | 31 | 1 | 1 | 6 | 5 | .226 | .327 | .412 | .740 |
| 11 |  | Tigers | 14-0 | 14 | 2025 | 1.000 | 14 | 14 | 0 | 466 | 59 | 108 | 25 | 1 | 13 | 55 | 49 | 9 | 120 | 5 | 1 | 526 | 174 | 39 | 0 | 2 | 1 | 7 | .232 | .316 | .373 | .689 |
| 12 |  | Nationals | 12-0 | 12 | 2025 | 1.000 | 12 | 12 | 0 | 402 | 72 | 107 | 18 | 4 | 13 | 68 | 38 | 6 | 95 | 11 | 7 | 454 | 172 | 35 | 6 | 2 | 0 | 4 | .266 | .337 | .428 | .765 |
| 13 |  | Giants | 20-0 | 20 | 2025 | 1.000 | 20 | 20 | 0 | 634 | 83 | 135 | 26 | 6 | 17 | 78 | 71 | 7 | 149 | 15 | 3 | 726 | 224 | 49 | 5 | 9 | 3 | 9 | .213 | .295 | .353 | .649 |
| 14 |  | Phillies | 15-0 | 15 | 2025 | 1.000 | 15 | 15 | 0 | 477 | 66 | 123 | 22 | 0 | 13 | 62 | 54 | 9 | 104 | 15 | 2 | 549 | 184 | 35 | 5 | 4 | 2 | 12 | .258 | .342 | .386 | .728 |
| 15 |  | Mets | 17-0 | 17 | 2025 | 1.000 | 17 | 17 | 0 | 557 | 70 | 137 | 34 | 5 | 20 | 69 | 56 | 10 | 137 | 10 | 1 | 632 | 241 | 59 | 1 | 8 | 4 | 15 | .246 | .322 | .433 | .754 |
| 16 |  | Brewers | 15-0 | 15 | 2025 | 1.000 | 15 | 15 | 0 | 486 | 67 | 121 | 30 | 1 | 13 | 65 | 55 | 1 | 113 | 19 | 4 | 554 | 192 | 44 | 3 | 9 | 4 | 7 | .249 | .321 | .395 | .716 |
| 17 |  | Diamondbacks | 11-0 | 11 | 2025 | 1.000 | 11 | 11 | 0 | 359 | 52 | 86 | 19 | 2 | 12 | 50 | 55 | 4 | 90 | 7 | 7 | 424 | 145 | 33 | 2 | 4 | 1 | 9 | .240 | .344 | .404 | .748 |
| 18 |  | Mariners | 18-0 | 18 | 2025 | 1.000 | 18 | 18 | 0 | 605 | 74 | 144 | 34 | 0 | 15 | 72 | 60 | 12 | 154 | 18 | 4 | 690 | 223 | 49 | 7 | 6 | 7 | 9 | .238 | .316 | .369 | .685 |
| 19 |  | Cubs | 14-0 | 14 | 2025 | 1.000 | 14 | 14 | 0 | 467 | 57 | 110 | 18 | 3 | 13 | 56 | 46 | 2 | 113 | 28 | 3 | 521 | 173 | 34 | 2 | 4 | 3 | 5 | .236 | .304 | .370 | .675 |
| 20 |  | Reds | 10-0 | 10 | 2025 | 1.000 | 10 | 10 | 0 | 339 | 40 | 87 | 17 | 0 | 9 | 39 | 31 | 2 | 84 | 7 | 2 | 374 | 131 | 26 | 2 | 0 | 2 | 5 | .257 | .323 | .386 | .709 |
| 21 |  | Angels | 16-0 | 16 | 2025 | 1.000 | 16 | 16 | 0 | 525 | 62 | 114 | 12 | 3 | 20 | 61 | 51 | 9 | 138 | 9 | 6 | 592 | 192 | 35 | 2 | 5 | 5 | 16 | .217 | .295 | .366 | .661 |
| 22 |  | Rangers | 14-0 | 14 | 2025 | 1.000 | 14 | 14 | 0 | 441 | 44 | 86 | 20 | 0 | 11 | 41 | 46 | 7 | 113 | 12 | 2 | 499 | 139 | 31 | 0 | 5 | 2 | 9 | .195 | .279 | .315 | .594 |
| 23 |  | Astros | 18-0 | 18 | 2025 | 1.000 | 18 | 18 | 0 | 577 | 55 | 134 | 17 | 1 | 19 | 51 | 45 | 5 | 143 | 12 | 10 | 631 | 210 | 37 | 2 | 2 | 4 | 16 | .232 | .293 | .364 | .656 |
| 24 |  | Royals | 14-0 | 14 | 2025 | 1.000 | 14 | 14 | 0 | 458 | 42 | 110 | 20 | 3 | 6 | 42 | 35 | 5 | 88 | 11 | 9 | 507 | 154 | 29 | 5 | 4 | 5 | 6 | .240 | .299 | .336 | .635 |
| 25 |  | Rockies | 9-0 | 9 | 2025 | 1.000 | 9 | 9 | 0 | 302 | 36 | 74 | 19 | 1 | 6 | 36 | 15 | 2 | 76 | 8 | 4 | 322 | 113 | 26 | 1 | 2 | 0 | 4 | .245 | .283 | .374 | .658 |
Some of the information used here was obtained free of charge from Retrosheet.
Cubs 
Brewers 
Cardinals 
Reds 
Pirates 
WSH 
ATL 
Phillies 
Mets 
Dodgers 
Padres 
Blue Jays 
Yankees 
Tigers 
Twins 
Astros 
Mariners 
TBR 
BAL 
CWS 
BOS 
LAA 
MIA 
