MLB Relative Power Index (RPI) - 2013

Season:
MLB RPI Rankings
RK TEAM RPI W L PCT SOS PWR RS RA EXPW-L EXPWP
1 Toronto Blue Jays .498 74 88 .457 .512 18 712 756 76-86 .470
2 Baltimore Orioles .514 85 77 .525 .511 14 745 709 85-77 .525
3 New York Yankees .513 85 77 .525 .510 15 650 671 78-84 .484
4 Tampa Bay Rays .521 92 71 .564 .507 10 700 646 88-75 .540
5 Boston Red Sox .530 97 65 .599 .507 1 853 656 102-60 .628
6 San Francisco Giants .496 76 86 .469 .504 20 629 691 73-89 .453
7 Milwaukee Brewers .492 74 88 .457 .504 21 640 687 75-87 .465
8 Cincinnati Reds .516 90 72 .556 .503 9 698 589 95-67 .584
9 Pittsburgh Pirates .522 94 68 .580 .502 7 634 577 89-73 .547
10 Chicago Cubs .478 66 96 .407 .502 26 602 689 70-92 .433
11 Houston Astros .455 51 111 .315 .501 30 610 848 55-107 .341
12 St. Louis Cardinals .525 97 65 .599 .501 2 783 596 103-59 .633
13 Kansas City Royals .508 86 76 .531 .500 13 648 601 87-75 .538
14 Minnesota Twins .477 66 96 .407 .500 27 614 788 61-101 .378
15 Colorado Rockies .489 74 88 .457 .499 22 706 760 75-87 .463
16 Arizona Diamondbacks .499 81 81 .500 .499 16 685 695 80-82 .493
17 San Diego Padres .491 76 86 .469 .498 19 618 700 71-91 .438
18 Seattle Mariners .483 71 91 .438 .498 25 624 754 66-96 .406
19 Philadelphia Phillies .486 73 89 .451 .498 24 610 749 65-97 .399
20 Chicago White Sox .471 63 99 .389 .498 28 598 723 66-96 .406
21 Detroit Tigers .517 93 69 .574 .498 3 796 624 100-62 .619
22 Texas Rangers .512 91 72 .558 .497 11 730 636 93-70 .568
23 Miami Marlins .468 62 100 .383 .497 29 513 646 63-99 .387
24 Cleveland Indians .514 92 70 .568 .496 8 745 662 91-71 .559
25 Los Angeles Dodgers .513 92 70 .568 .494 5 649 582 90-72 .554
26 Los Angeles Angels .491 78 84 .481 .494 17 733 737 81-81 .497
27 New York Mets .485 74 88 .457 .494 23 619 684 73-89 .450
28 Washington Nationals .503 86 76 .531 .493 12 656 626 85-77 .523
29 Atlanta Braves .516 96 66 .593 .491 4 688 548 99-63 .612
30 Oakland Athletics .516 96 66 .593 .491 6 767 625 97-65 .601
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.