Between the 1980 and 1989 seasons, the Toronto Blue Jays had the highest run differential by an AL team in a season, with a differential of 190 runs in 1987.
| 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 |  | Blue Jays | 190 | 1987 | 162 | .593 | 96 | 66 | 5,635 | 845 | 1,514 | 277 | 38 | 215 | 790 | 555 | 38 | 970 | 126 | 50 | 6,293 | 2,512 | 530 | 30 | 35 | 45 | 136 | .269 | .336 | .446 | .782 |
| 2 |  | Tigers | 186 | 1984 | 162 | .642 | 104 | 58 | 5,644 | 829 | 1,529 | 254 | 46 | 187 | 788 | 602 | 34 | 941 | 106 | 68 | 6,373 | 2,436 | 487 | 48 | 45 | 51 | 102 | .271 | .342 | .432 | .774 |
| 3 |  | Athletics | 180 | 1988 | 162 | .642 | 104 | 58 | 5,602 | 800 | 1,474 | 251 | 22 | 156 | 752 | 580 | 65 | 926 | 129 | 54 | 6,356 | 2,237 | 429 | 54 | 55 | 29 | 142 | .263 | .336 | .399 | .736 |
| 4 |  | Yankees | 179 | 1985 | 161 | .602 | 97 | 64 | 5,458 | 839 | 1,458 | 272 | 31 | 176 | 793 | 620 | 50 | 771 | 155 | 53 | 6,236 | 2,320 | 479 | 48 | 60 | 50 | 119 | .267 | .344 | .425 | .769 |
| 5 |  | Brewers | 174 | 1982 | 163 | .586 | 95 | 67 | 5,733 | 891 | 1,599 | 277 | 41 | 216 | 843 | 484 | 18 | 714 | 84 | 52 | 6,337 | 2,606 | 534 | 56 | 46 | 42 | 106 | .279 | .335 | .455 | .789 |
| 6 | | Blue Jays | 171 | 1985 | 161 | .615 | 99 | 62 | 5,508 | 759 | 1,482 | 281 | 53 | 158 | 714 | 503 | 30 | 807 | 144 | 77 | 6,106 | 2,343 | 492 | 21 | 44 | 44 | 121 | .269 | .331 | .425 | .757 |
| 7 |  | Orioles | 165 | 1980 | 162 | .617 | 100 | 62 | 5,585 | 805 | 1,523 | 258 | 29 | 156 | 751 | 587 | 21 | 766 | 111 | 38 | 6,281 | 2,307 | 443 | 42 | 46 | 38 | 158 | .273 | .342 | .413 | .755 |
| 8 | | Tigers | 161 | 1987 | 162 | .605 | 98 | 64 | 5,649 | 896 | 1,535 | 274 | 32 | 225 | 840 | 653 | 46 | 913 | 106 | 50 | 6,443 | 2,548 | 531 | 39 | 56 | 44 | 108 | .272 | .349 | .451 | .800 |
| 9 | | Yankees | 158 | 1980 | 162 | .636 | 103 | 59 | 5,553 | 820 | 1,484 | 239 | 34 | 189 | 772 | 643 | 28 | 739 | 86 | 36 | 6,329 | 2,358 | 462 | 51 | 54 | 58 | 136 | .267 | .343 | .425 | .768 |
| 10 |  | White Sox | 150 | 1983 | 162 | .611 | 99 | 63 | 5,484 | 800 | 1,439 | 270 | 42 | 157 | 762 | 527 | 43 | 888 | 165 | 50 | 6,163 | 2,264 | 469 | 53 | 56 | 50 | 111 | .262 | .329 | .413 | .742 |
| 11 | | Orioles | 147 | 1983 | 162 | .605 | 98 | 64 | 5,546 | 799 | 1,492 | 283 | 27 | 168 | 761 | 601 | 23 | 800 | 61 | 33 | 6,272 | 2,333 | 478 | 46 | 56 | 48 | 144 | .269 | .340 | .421 | .761 |
| 12 |  | Angels | 144 | 1982 | 162 | .574 | 93 | 69 | 5,532 | 814 | 1,518 | 268 | 26 | 186 | 760 | 613 | 35 | 760 | 55 | 53 | 6,350 | 2,396 | 480 | 114 | 56 | 46 | 130 | .274 | .347 | .433 | .780 |
| 13 | | Athletics | 136 | 1989 | 162 | .611 | 99 | 63 | 5,416 | 712 | 1,414 | 220 | 25 | 127 | 659 | 562 | 34 | 855 | 157 | 55 | 6,110 | 2,065 | 372 | 36 | 62 | 37 | 163 | .261 | .331 | .381 | .712 |
| 14 | | Brewers | 129 | 1980 | 162 | .531 | 86 | 76 | 5,653 | 811 | 1,555 | 298 | 36 | 203 | 774 | 455 | 25 | 745 | 131 | 56 | 6,242 | 2,534 | 537 | 58 | 51 | 59 | 98 | .275 | .329 | .448 | .777 |
| 15 |  | Red Sox | 124 | 1988 | 162 | .549 | 89 | 73 | 5,545 | 813 | 1,569 | 310 | 39 | 124 | 760 | 623 | 45 | 728 | 65 | 36 | 6,334 | 2,329 | 473 | 66 | 55 | 53 | 139 | .283 | .357 | .420 | .777 |
| 16 |  | Royals | 115 | 1980 | 162 | .599 | 97 | 65 | 5,714 | 809 | 1,633 | 266 | 59 | 115 | 766 | 508 | 38 | 709 | 185 | 43 | 6,357 | 2,362 | 440 | 34 | 63 | 45 | 147 | .286 | .345 | .413 | .758 |
| 17 | | Tigers | 110 | 1983 | 162 | .568 | 92 | 70 | 5,592 | 789 | 1,530 | 283 | 53 | 156 | 749 | 508 | 39 | 831 | 93 | 53 | 6,246 | 2,387 | 492 | 48 | 59 | 37 | 123 | .274 | .335 | .427 | .762 |
| 18 | | Angels | 102 | 1986 | 162 | .568 | 92 | 70 | 5,433 | 786 | 1,387 | 236 | 36 | 167 | 743 | 671 | 40 | 860 | 109 | 42 | 6,296 | 2,196 | 439 | 91 | 61 | 45 | 134 | .255 | .338 | .404 | .742 |
| 19 | | Red Sox | 98 | 1986 | 161 | .590 | 95 | 66 | 5,498 | 794 | 1,488 | 320 | 21 | 144 | 752 | 595 | 66 | 707 | 41 | 34 | 6,255 | 2,282 | 485 | 44 | 52 | 56 | 142 | .271 | .346 | .415 | .761 |
| 20 | | Angels | 91 | 1989 | 162 | .562 | 91 | 71 | 5,545 | 669 | 1,422 | 208 | 37 | 145 | 624 | 429 | 28 | 1,011 | 89 | 40 | 6,102 | 2,139 | 390 | 54 | 46 | 48 | 114 | .256 | .311 | .386 | .696 |
| 21 |  | Twins | 87 | 1988 | 162 | .562 | 91 | 71 | 5,510 | 759 | 1,508 | 294 | 31 | 151 | 710 | 528 | 55 | 832 | 107 | 63 | 6,180 | 2,317 | 476 | 37 | 50 | 52 | 130 | .274 | .340 | .421 | .761 |
| 22 | | Orioles | 87 | 1982 | 163 | .580 | 94 | 68 | 5,557 | 774 | 1,478 | 259 | 27 | 179 | 735 | 634 | 25 | 796 | 49 | 38 | 6,325 | 2,328 | 465 | 57 | 52 | 52 | 141 | .266 | .341 | .419 | .760 |
| 23 | | Tigers | 84 | 1986 | 162 | .537 | 87 | 75 | 5,512 | 798 | 1,447 | 234 | 30 | 198 | 751 | 613 | 43 | 885 | 138 | 58 | 6,269 | 2,335 | 462 | 52 | 49 | 35 | 99 | .263 | .338 | .424 | .762 |
| 24 | | Blue Jays | 83 | 1988 | 162 | .537 | 87 | 75 | 5,557 | 763 | 1,491 | 271 | 47 | 158 | 706 | 521 | 31 | 935 | 107 | 36 | 6,193 | 2,330 | 476 | 34 | 50 | 35 | 145 | .268 | .332 | .419 | .751 |
| 25 |  | Blue Jays | 80 | 1989 | 162 | .549 | 89 | 73 | 5,581 | 731 | 1,449 | 265 | 40 | 142 | 685 | 521 | 31 | 923 | 144 | 58 | 6,216 | 2,220 | 447 | 30 | 53 | 32 | 124 | .260 | .323 | .398 | .721 |
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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 |
Marlins
Nationals
Mets
Pirates
Cardinals
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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Tigers
Royals
Rangers
Mariners
Athletics
Angels