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 .543 47 28 .627 .516 0 437 293 52-23 .690
2 Tampa Bay Rays .529 45 31 .592 .508 0 367 291 47-29 .614
3 San Francisco Giants .529 48 26 .649 .489 0 372 271 48-26 .653
4 San Diego Padres .525 45 32 .584 .505 0 348 269 48-29 .626
5 Oakland Athletics .522 46 31 .597 .497 0 353 320 42-35 .549
6 Chicago White Sox .522 44 30 .595 .497 0 356 270 47-27 .635
7 Los Angeles Dodgers .521 44 31 .587 .499 0 380 288 48-27 .635
8 Boston Red Sox .518 44 31 .587 .496 0 373 342 41-34 .543
9 Toronto Blue Jays .518 38 35 .521 .517 0 365 310 42-31 .581
10 Chicago Cubs .518 42 33 .560 .503 0 325 297 41-34 .545
11 Cleveland Indians .510 41 31 .569 .490 0 310 306 36-36 .506
12 New York Yankees .509 40 34 .541 .499 0 300 293 38-36 .512
13 Seattle Mariners .509 39 37 .513 .507 0 304 352 32-44 .427
14 Los Angeles Angels .508 36 38 .486 .516 0 360 383 35-39 .469
15 Milwaukee Brewers .502 42 33 .560 .482 0 299 300 37-38 .498
16 Cincinnati Reds .500 37 36 .507 .498 0 366 374 36-37 .489
17 New York Mets .500 38 31 .551 .483 0 253 233 37-32 .541
18 Philadelphia Phillies .500 34 37 .479 .506 0 309 322 34-37 .479
19 Detroit Tigers .490 32 43 .427 .511 0 296 370 29-46 .390
20 Atlanta Braves .489 35 39 .473 .494 0 344 349 36-38 .493
21 Washington Nationals .487 36 36 .500 .483 0 283 289 35-37 .490
22 St. Louis Cardinals .487 36 39 .480 .489 0 293 341 32-43 .425
23 Kansas City Royals .484 33 40 .452 .495 0 308 355 31-42 .429
24 Texas Rangers .480 27 48 .360 .520 0 298 370 30-45 .393
25 Colorado Rockies .476 31 44 .413 .497 0 328 383 32-43 .423
26 Miami Marlins .473 31 43 .419 .491 0 286 275 38-36 .520
27 Minnesota Twins .472 31 43 .419 .490 0 338 393 31-43 .425
28 Pittsburgh Pirates .471 27 46 .370 .505 0 262 351 26-47 .358
29 Baltimore Orioles .465 23 52 .307 .517 0 294 408 26-49 .342
30 Arizona Diamondbacks .442 21 55 .276 .497 0 316 425 27-49 .356
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.