MLB Relative Power Index (RPI) - 2013

Season:
MLB RPI Rankings
RK TEAM RPI W L PCT SOS PWR RS RA EXPW-L EXPWP
1 Arizona Diamondbacks .582 14 10 .583 .581 13 106 89 14-10 .587
2 Colorado Rockies .561 15 9 .625 .540 8 125 104 14-10 .591
3 Boston Red Sox .560 17 7 .708 .511 3 122 87 16-8 .663
4 St. Louis Cardinals .559 14 9 .609 .542 9 114 81 15-8 .665
5 Baltimore Orioles .555 15 9 .625 .532 11 121 95 15-9 .619
6 New York Yankees .553 14 9 .609 .534 12 109 95 13-10 .568
7 Pittsburgh Pirates .552 14 10 .583 .541 20 89 88 12-12 .506
8 Atlanta Braves .545 15 8 .652 .509 1 100 72 15-8 .659
9 Kansas City Royals .536 12 8 .600 .514 14 84 69 12-8 .597
10 Milwaukee Brewers .526 12 10 .545 .519 22 96 99 11-11 .485
11 Tampa Bay Rays .524 11 13 .458 .546 17 95 94 12-12 .505
12 San Francisco Giants .516 13 11 .542 .507 7 103 100 12-12 .515
13 Detroit Tigers .508 12 10 .545 .495 5 107 91 13-9 .580
14 Minnesota Twins .501 10 10 .500 .502 25 83 89 9-11 .465
15 Texas Rangers .499 16 8 .667 .443 6 108 75 16-8 .675
16 Philadelphia Phillies .493 11 14 .440 .511 21 93 107 11-14 .430
17 Los Angeles Dodgers .490 11 12 .478 .494 16 78 94 9-14 .408
18 Oakland Athletics .488 13 12 .520 .477 2 129 115 14-11 .557
19 Toronto Blue Jays .484 9 16 .360 .525 15 93 127 9-16 .349
20 Washington Nationals .481 13 11 .542 .460 4 91 99 11-13 .458
21 Cincinnati Reds .476 13 12 .520 .461 10 118 97 15-10 .597
22 Chicago Cubs .472 9 14 .391 .499 28 76 89 10-13 .422
23 San Diego Padres .465 8 15 .348 .504 27 79 107 8-15 .353
24 Los Angeles Angels .462 9 14 .391 .486 19 96 117 9-14 .402
25 Cleveland Indians .454 8 12 .400 .472 26 87 95 9-11 .456
26 New York Mets .449 10 12 .455 .447 18 114 107 12-10 .532
27 Chicago White Sox .448 10 13 .435 .452 23 80 88 10-13 .452
28 Seattle Mariners .432 10 16 .385 .448 24 85 118 9-17 .342
29 Houston Astros .413 7 17 .292 .453 29 97 142 8-16 .318
30 Miami Marlins .395 5 19 .208 .458 30 61 109 6-18 .238
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.