MLB Relative Power Index (RPI) - 2021

Season:
MLB RPI Rankings
RK TEAM RPI W L PCT SOS PWR RS RA EXPW-L EXPWP
1 Los Angeles Dodgers .527 56 35 .615 .498 0 476 334 61-30 .670
2 Houston Astros .535 55 36 .604 .512 0 496 360 60-31 .655
3 San Francisco Giants .529 57 32 .640 .492 0 441 325 58-31 .648
4 Chicago White Sox .517 54 35 .607 .487 0 456 339 57-32 .644
5 Tampa Bay Rays .527 53 37 .589 .506 0 440 355 55-35 .606
6 San Diego Padres .518 53 40 .570 .501 0 428 353 55-38 .595
7 Toronto Blue Jays .512 45 42 .517 .510 0 444 372 51-36 .588
8 Boston Red Sox .524 55 36 .604 .498 0 464 407 51-40 .565
9 Milwaukee Brewers .507 53 39 .576 .484 0 394 348 52-40 .562
10 Oakland Athletics .517 52 40 .565 .501 0 408 376 50-42 .541
11 Miami Marlins .484 39 50 .438 .499 0 353 336 47-42 .525
12 Atlanta Braves .492 44 45 .494 .491 0 420 401 47-42 .523
13 New York Mets .499 47 40 .540 .485 0 327 318 45-42 .514
14 Cincinnati Reds .509 48 42 .533 .500 0 435 427 46-44 .509
15 New York Yankees .506 46 43 .517 .503 0 370 369 45-44 .501
16 Philadelphia Phillies .510 44 44 .500 .513 0 402 411 43-45 .489
17 Washington Nationals .492 42 47 .472 .498 0 372 387 43-46 .480
18 Cleveland Indians .497 45 42 .517 .491 0 379 395 42-45 .479
19 Los Angeles Angels .510 45 44 .506 .511 0 435 461 42-47 .471
20 Chicago Cubs .502 44 46 .489 .506 0 378 402 42-48 .469
21 St. Louis Cardinals .488 44 46 .489 .487 0 358 398 40-50 .447
22 Colorado Rockies .482 40 51 .440 .496 0 390 438 40-51 .442
23 Seattle Mariners .513 48 43 .527 .508 0 371 421 40-51 .437
24 Minnesota Twins .475 39 50 .438 .487 0 421 478 39-50 .437
25 Texas Rangers .485 35 55 .389 .517 0 369 428 38-52 .426
26 Detroit Tigers .484 40 51 .440 .499 0 378 457 37-54 .406
27 Kansas City Royals .472 36 53 .404 .494 0 364 463 34-55 .382
28 Baltimore Orioles .466 28 61 .315 .517 0 364 502 31-58 .345
29 Pittsburgh Pirates .468 34 56 .378 .498 0 319 441 31-59 .344
30 Arizona Diamondbacks .451 26 66 .283 .507 0 381 531 31-61 .340
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.