Data courtesy ESPN.com. Ratings current through 30 September 2013 (2431 games).
| Rank | Team | Div. | Z-Rating | BSWP | nDWP | Record | Pct | Ratio | SOS | Rank | ||||
| 1 | Boston Red Sox | AE | 155.03 | .6095 | .6154 | 97-65 | .599 | 1.492 | 103.89 | 6 | ||||
| 2 | St. Louis Cardinals | NC | 144.46 | .5923 | .5928 | 97-65 | .599 | 1.492 | 96.806 | 25 | ||||
| 3 | Oakland Athletics | AW | 138.52 | .5819 | .5747 | 96-66 | .593 | 1.455 | 95.229 | 28 | ||||
| 4 | Tampa Bay Rays | AE | 135.49 | .5764 | .5837 | 92-71 | .564 | 1.296 | 104.56 | 5 | ||||
| 5 | Pittsburgh Pirates | NC | 135.40 | .5763 | .5774 | 94-68 | .580 | 1.382 | 97.950 | 20 | ||||
| 6 | Atlanta Braves | NE | 133.20 | .5722 | .5642 | 96-66 | .593 | 1.455 | 91.572 | 30 | ||||
| 7 | Detroit Tigers | AC | 131.70 | .5694 | .5659 | 93-69 | .574 | 1.348 | 97.712 | 21 | ||||
| 8 | Cleveland Indians | AC | 128.40 | .5631 | .5598 | 92-70 | .568 | 1.314 | 97.698 | 22 | ||||
| 9 | Los Angeles Dodgers | NW | 126.32 | .5590 | .5548 | 92-70 | .568 | 1.314 | 96.112 | 27 | ||||
| 10 | Cincinnati Reds | NC | 124.12 | .5546 | .5564 | 90-72 | .556 | 1.250 | 99.294 | 15 | ||||
| 11 | Texas Rangers | AW | 122.53 | .5513 | .5450 | 91-72 | .558 | 1.264 | 96.949 | 24 | ||||
| 12 | Baltimore Orioles | AE | 119.34 | .5447 | .5532 | 85-77 | .525 | 1.104 | 108.11 | 2 | ||||
| 13 | New York Yankees | AE | 118.54 | .5430 | .5516 | 85-77 | .525 | 1.104 | 107.38 | 3 | ||||
| 14 | Kansas City Royals | AC | 113.06 | .5311 | .5289 | 86-76 | .531 | 1.132 | 99.912 | 13 | ||||
| 15 | Washington Nationals | NE | 106.08 | .5150 | .5088 | 86-76 | .531 | 1.132 | 93.744 | 29 | ||||
| 16 | Arizona Diamondbacks | NW | 99.235 | .4981 | .4960 | 81-81 | .500 | 1.000 | 99.235 | 16 | ||||
| 17 | Toronto Blue Jays | AE | 93.204 | .4822 | .4929 | 74-88 | .457 | 0.841 | 110.84 | 1 | ||||
| 18 | LA Angels of Anaheim | AW | 92.417 | .4800 | .4758 | 78-84 | .481 | 0.929 | 99.526 | 14 | ||||
| 19 | San Francisco Giants | NW | 88.860 | .4701 | .4691 | 76-86 | .469 | 0.884 | 100.55 | 12 | ||||
| 20 | San Diego Padres | NW | 87.556 | .4664 | .4655 | 76-86 | .469 | 0.884 | 99.076 | 17 | ||||
| 21 | Milwaukee Brewers | NC | 84.978 | .4588 | .4639 | 74-88 | .457 | 0.841 | 101.06 | 10 | ||||
| 22 | Colorado Rockies | NW | 83.236 | .4536 | .4532 | 74-88 | .457 | 0.841 | 98.983 | 19 | ||||
| 23 | New York Mets | NE | 80.853 | .4463 | .4425 | 74-88 | .457 | 0.841 | 96.150 | 26 | ||||
| 24 | Philadelphia Phillies | NE | 79.956 | .4435 | .4398 | 73-89 | .451 | 0.820 | 97.481 | 23 | ||||
| 25 | Seattle Mariners | AW | 78.669 | .4395 | .4366 | 71-91 | .438 | 0.780 | 100.83 | 11 | ||||
| 26 | Minnesota Twins | AC | 70.693 | .4130 | .4147 | 66-96 | .407 | 0.688 | 102.83 | 7 | ||||
| 27 | Chicago Cubs | NC | 70.593 | .4126 | .4191 | 66-96 | .407 | 0.688 | 102.68 | 8 | ||||
| 28 | Chicago White Sox | AC | 65.258 | .3934 | .3958 | 63-99 | .389 | 0.636 | 102.55 | 9 | ||||
| 29 | Miami Marlins | NE | 61.388 | .3786 | .3773 | 62-100 | .383 | 0.620 | 99.013 | 18 | ||||
| 30 | Houston Astros | AW | 48.585 | .3243 | .3254 | 51-111 | .315 | 0.459 | 105.74 | 4 |
| Rk | Division | BSWP | Tms | Top Team |
| 1 | American League East (AE) | .5593 | 5 | Boston Red Sox (1) |
| 2 | National League Central (NC) | .5219 | 5 | St. Louis Cardinals (2) |
| 3 | American League Central (AC) | .4930 | 5 | Detroit Tigers (7) |
| 4 | National League West (NW) | .4877 | 5 | Los Angeles Dodgers (9) |
| 5 | American League West (AW) | .4715 | 5 | Oakland Athletics (3) |
| 6 | National League East (NE) | .4665 | 5 | Atlanta Braves (6) |