MLB Relative Power Index (RPI) - 2021

Season:
MLB RPI Rankings
RK TEAM RPI W L PCT SOS PWR RS RA EXPW-L EXPWP
1 Houston Astros .526 95 67 .586 .506 0 863 658 102-60 .632
2 Tampa Bay Rays .534 100 62 .617 .506 0 857 651 103-59 .634
3 Toronto Blue Jays .522 91 71 .562 .508 0 846 663 100-62 .620
4 Los Angeles Dodgers .536 106 56 .654 .497 0 830 561 111-51 .686
5 Boston Red Sox .523 92 70 .568 .507 0 829 749 89-73 .551
6 San Francisco Giants .538 107 55 .660 .497 0 804 594 105-57 .647
7 Chicago White Sox .516 93 69 .574 .497 0 796 636 99-63 .610
8 Atlanta Braves .502 88 73 .547 .487 0 790 656 95-66 .592
9 Cincinnati Reds .499 83 79 .512 .494 0 786 760 84-78 .517
10 Oakland Athletics .513 86 76 .531 .507 0 743 687 87-75 .539
11 Colorado Rockies .491 74 87 .460 .501 0 739 796 75-86 .463
12 Milwaukee Brewers .515 95 67 .586 .491 0 738 623 95-67 .584
13 Philadelphia Phillies .493 82 80 .506 .489 0 734 745 80-82 .493
14 Minnesota Twins .491 73 89 .451 .504 0 729 834 70-92 .433
15 San Diego Padres .498 79 83 .488 .501 0 729 708 83-79 .515
16 Washington Nationals .467 65 97 .401 .489 0 724 820 71-91 .438
17 Los Angeles Angels .500 77 85 .475 .509 0 723 804 72-90 .447
18 Cleveland Indians .501 80 82 .494 .503 0 717 727 80-82 .493
19 New York Yankees .521 92 70 .568 .505 0 711 669 86-76 .530
20 St. Louis Cardinals .507 90 72 .556 .490 0 706 672 85-77 .525
21 Chicago Cubs .482 71 91 .438 .497 0 705 839 67-95 .414
22 Detroit Tigers .492 77 85 .475 .497 0 697 756 74-88 .459
23 Seattle Mariners .518 90 72 .556 .506 0 697 748 75-87 .465
24 Kansas City Royals .491 74 88 .457 .503 0 686 788 70-92 .431
25 Arizona Diamondbacks .461 52 110 .321 .507 0 679 893 59-103 .366
26 Baltimore Orioles .465 52 110 .321 .513 0 659 956 52-110 .322
27 New York Mets .486 77 85 .475 .489 0 636 668 77-85 .475
28 Texas Rangers .475 60 102 .370 .510 0 625 815 60-102 .370
29 Miami Marlins .473 67 95 .414 .493 0 623 701 71-91 .441
30 Pittsburgh Pirates .465 61 101 .377 .495 0 609 833 56-106 .348
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.