MLB Relative Power Index - 2008
| MLB RPI Rankings | ||||||||||||
| RNK | TEAM | RPI | W | L | PCT | SOS | PWR | RS | RA | ExpW-L | ExpWP | |
| 1 | Boston Red Sox | .537 | 23 | 14 | .622 | .509 | 9 | 187 | 157 | 22-15 | .587 | |
| 2 | Oakland Athletics | .530 | 22 | 14 | .611 | .502 | 2 | 171 | 129 | 23-13 | .637 | |
| 3 | New York Mets | .528 | 17 | 15 | .531 | .528 | 13 | 152 | 143 | 17-15 | .530 | |
| 4 | Arizona Diamondbacks | .528 | 23 | 12 | .657 | .485 | 1 | 201 | 148 | 23-12 | .648 | |
| 5 | Florida Marlins | .522 | 20 | 14 | .588 | .500 | 16 | 158 | 160 | 17-17 | .494 | |
| 6 | Los Angeles Angels | .522 | 22 | 14 | .611 | .492 | 5 | 173 | 166 | 19-17 | .521 | |
| 7 | Tampa Bay Rays | .515 | 18 | 16 | .529 | .510 | 6 | 159 | 150 | 18-16 | .529 | |
| 8 | St. Louis Cardinals | .507 | 22 | 14 | .611 | .472 | 4 | 166 | 142 | 21-15 | .577 | |
| 9 | Philadelphia Phillies | .506 | 20 | 16 | .556 | .490 | 7 | 173 | 159 | 20-16 | .542 | |
| 10 | Chicago Cubs | .506 | 19 | 15 | .559 | .489 | 3 | 195 | 151 | 21-13 | .625 | |
| 11 | Los Angeles Dodgers | .505 | 19 | 15 | .559 | .486 | 10 | 178 | 147 | 20-14 | .595 | |
| 12 | Milwaukee Brewers | .501 | 16 | 18 | .471 | .512 | 11 | 146 | 168 | 15-19 | .430 | |
| 13 | Houston Astros | .501 | 18 | 17 | .514 | .497 | 18 | 165 | 160 | 18-17 | .515 | |
| 14 | Minnesota Twins | .501 | 17 | 16 | .515 | .496 | 21 | 140 | 144 | 16-17 | .486 | |
| 15 | Washington Nationals | .501 | 15 | 20 | .429 | .525 | 26 | 141 | 170 | 14-21 | .408 | |
| 16 | Cleveland Indians | .499 | 16 | 18 | .471 | .508 | 12 | 143 | 137 | 18-16 | .521 | |
| 17 | Toronto Blue Jays | .498 | 17 | 19 | .472 | .507 | 22 | 144 | 132 | 20-16 | .543 | |
| 18 | Atlanta Braves | .498 | 18 | 15 | .545 | .482 | 15 | 169 | 124 | 21-12 | .650 | |
| 19 | New York Yankees | .497 | 18 | 18 | .500 | .495 | 20 | 157 | 156 | 18-18 | .503 | |
| 20 | Baltimore Orioles | .492 | 17 | 18 | .486 | .495 | 17 | 140 | 151 | 16-19 | .462 | |
| 21 | Chicago White Sox | .491 | 16 | 17 | .485 | .493 | 8 | 150 | 133 | 18-15 | .560 | |
| 22 | Colorado Rockies | .488 | 14 | 21 | .400 | .517 | 28 | 157 | 187 | 14-21 | .413 | |
| 23 | Pittsburgh Pirates | .487 | 15 | 19 | .441 | .502 | 27 | 171 | 192 | 15-19 | .442 | |
| 24 | Cincinnati Reds | .483 | 14 | 21 | .400 | .511 | 24 | 146 | 170 | 15-20 | .424 | |
| 25 | Texas Rangers | .482 | 16 | 20 | .444 | .495 | 29 | 163 | 195 | 15-21 | .411 | |
| 26 | Kansas City Royals | .482 | 15 | 19 | .441 | .496 | 25 | 120 | 150 | 13-21 | .390 | |
| 27 | Detroit Tigers | .479 | 15 | 21 | .417 | .500 | 14 | 172 | 199 | 15-21 | .428 | |
| 28 | San Francisco Giants | .475 | 14 | 21 | .400 | .500 | 23 | 117 | 165 | 12-23 | .335 | |
| 29 | Seattle Mariners | .470 | 14 | 22 | .389 | .497 | 19 | 141 | 161 | 16-20 | .434 | |
| 30 | San Diego Padres | .467 | 12 | 23 | .343 | .508 | 30 | 117 | 166 | 12-23 | .332 | |
| Glossary |
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W: Wins, L: Losses, PCT: Winning percentage, RPI: Relative Power Index+, SOS: Strength of schedule , PWR: ESPN Power Ranking , RS: Runs scored, RA: Runs allowed, ExW-L: Expected W-L*, ExWP: Expected winning percentage*
+The basic formula is 25% team winning percentage, 50% opponents' average winning percentage, and 25% opponents' opponents' average winning percentage. *ExW-L and ExWP are derived from Bill James' Pythagorean theorem of baseball: Runs scored [squared] / (Runs scored [squared] + runs allowed [squared]). This formula was designed to relate a team's runs scored and runs allowed to its won-lost record. |





