MLB Relative Power Index (RPI) - 2013

Season:
MLB RPI Rankings
RK TEAM RPI W L PCT SOS PWR RS RA EXPW-L EXPWP
1 St. Louis Cardinals .551 27 15 .643 .521 1 197 148 27-15 .639
2 New York Yankees .543 27 16 .628 .515 7 184 159 25-18 .573
3 Arizona Diamondbacks .531 25 18 .581 .514 9 179 153 25-18 .578
4 Boston Red Sox .528 26 17 .605 .503 5 212 178 25-18 .587
5 Tampa Bay Rays .525 22 20 .524 .526 17 207 196 22-20 .527
6 Atlanta Braves .524 24 18 .571 .508 8 181 150 25-17 .593
7 Colorado Rockies .523 23 20 .535 .518 16 216 189 24-19 .566
8 Cleveland Indians .522 24 17 .585 .501 12 202 173 24-17 .577
9 Pittsburgh Pirates .521 25 18 .581 .501 14 175 157 24-19 .554
10 San Francisco Giants .521 24 19 .558 .508 3 202 202 22-22 .500
11 Texas Rangers .516 28 15 .651 .471 2 201 150 28-15 .642
12 Cincinnati Reds .516 26 17 .605 .486 10 208 158 27-16 .634
13 Baltimore Orioles .510 23 19 .548 .497 4 212 192 23-19 .549
14 Kansas City Royals .509 20 19 .513 .508 13 168 153 21-18 .547
15 Detroit Tigers .505 23 18 .561 .486 6 214 164 26-15 .630
16 Milwaukee Brewers .503 17 24 .415 .533 22 175 203 17-24 .426
17 Washington Nationals .501 23 20 .535 .490 11 151 159 20-23 .474
18 Minnesota Twins .501 18 21 .462 .514 18 179 186 19-20 .481
19 Toronto Blue Jays .499 17 26 .395 .534 28 177 222 17-26 .389
20 Oakland Athletics .495 22 22 .500 .493 15 203 201 22-22 .505
21 Philadelphia Phillies .489 20 23 .465 .498 20 153 188 17-26 .398
22 Seattle Mariners .484 20 23 .465 .490 19 160 174 20-23 .458
23 Chicago White Sox .482 19 22 .463 .488 24 153 164 19-22 .465
24 Chicago Cubs .481 18 24 .429 .498 27 170 172 21-21 .494
25 San Diego Padres .472 19 23 .452 .478 21 163 184 18-24 .440
26 Los Angeles Dodgers .470 17 24 .415 .489 26 140 175 16-25 .390
27 Los Angeles Angels .455 16 27 .372 .482 23 183 225 17-26 .398
28 New York Mets .451 16 24 .400 .467 25 170 199 17-23 .422
29 Houston Astros .445 12 31 .279 .500 30 173 260 13-30 .307
30 Miami Marlins .417 11 32 .256 .471 29 115 189 12-31 .270
Glossary
  • 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.