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MLB Relative Power Index (RPI) - 2009

Season:
MLB RPI Rankings
RK TEAM RPI W L PCT SOS PWR RS RA EXPW-L EXPWP
1 New York Yankees .538 103 59 .636 .505 1 915 753 97-65 .596
2 Los Angeles Angels .532 97 65 .599 .509 3 883 761 93-69 .574
3 Boston Red Sox .526 95 67 .586 .506 4 872 736 95-67 .584
4 Los Angeles Dodgers .526 95 67 .586 .505 2 780 611 100-62 .620
5 Texas Rangers .517 87 75 .537 .510 9 784 740 86-76 .529
6 Colorado Rockies .516 92 70 .568 .498 7 804 715 90-72 .558
7 Seattle Mariners .514 85 77 .525 .510 16 640 692 75-87 .461
8 San Francisco Giants .513 88 74 .543 .503 13 657 611 87-75 .536
9 Philadelphia Phillies .513 93 69 .574 .493 6 820 709 93-69 .572
10 Tampa Bay Rays .510 84 78 .519 .507 15 803 754 86-76 .531
11 Minnesota Twins .506 87 76 .534 .497 11 817 765 87-76 .533
12 St. Louis Cardinals .506 91 71 .562 .487 5 730 640 92-70 .565
13 Florida Marlins .505 87 75 .537 .494 12 772 766 82-80 .504
14 Atlanta Braves .504 86 76 .531 .495 8 735 641 92-70 .568
15 Oakland Athletics .503 75 87 .463 .516 18 759 761 81-81 .499
16 Detroit Tigers .503 86 77 .528 .494 10 743 745 81-82 .499
17 Chicago Cubs .498 83 78 .516 .492 14 707 672 85-76 .525
18 Toronto Blue Jays .498 75 87 .463 .509 21 798 771 84-78 .517
19 San Diego Padres .495 75 87 .463 .506 22 638 769 66-96 .408
20 Milwaukee Brewers .493 80 82 .494 .493 17 785 818 78-84 .479
21 Chicago White Sox .493 79 83 .488 .495 19 724 732 80-82 .495
22 Cincinnati Reds .487 78 84 .481 .489 20 673 723 75-87 .464
23 Arizona Diamondbacks .487 70 92 .432 .505 25 720 782 74-88 .459
24 Houston Astros .483 74 88 .457 .492 23 643 770 67-95 .411
25 New York Mets .482 70 92 .432 .498 24 671 757 71-91 .440
26 Baltimore Orioles .481 64 98 .395 .509 28 741 876 68-94 .417
27 Cleveland Indians .474 65 97 .401 .498 26 773 865 72-90 .444
28 Kansas City Royals .473 65 97 .401 .497 27 686 842 65-97 .399
29 Pittsburgh Pirates .464 62 99 .385 .490 29 636 768 65-96 .407
30 Washington Nationals .463 59 103 .364 .496 30 710 874 64-98 .398
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.

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