MLB Relative Power Index (RPI) - 2013

Season:
MLB RPI Rankings
RK TEAM RPI W L PCT SOS PWR RS RA EXPW-L EXPWP
1 St. Louis Cardinals .550 30 16 .652 .516 2 218 159 30-16 .653
2 New York Yankees .538 28 18 .609 .514 4 195 172 26-20 .562
3 Atlanta Braves .531 28 18 .609 .505 9 204 160 28-18 .619
4 Colorado Rockies .528 26 21 .553 .520 15 231 199 27-20 .574
5 Arizona Diamondbacks .526 26 21 .553 .517 8 190 165 27-20 .570
6 Pittsburgh Pirates .523 28 18 .609 .494 12 182 161 26-20 .561
7 San Francisco Giants .521 26 21 .553 .510 11 215 211 24-23 .509
8 Boston Red Sox .521 28 19 .596 .496 5 228 190 28-19 .590
9 Tampa Bay Rays .520 24 22 .522 .519 14 222 211 24-22 .525
10 Cleveland Indians .518 26 19 .578 .499 7 226 197 26-19 .568
11 Cincinnati Reds .518 29 18 .617 .485 3 225 168 30-17 .642
12 Texas Rangers .515 30 17 .638 .473 1 217 169 29-18 .622
13 Detroit Tigers .510 25 19 .568 .491 6 238 183 28-16 .628
14 Baltimore Orioles .510 25 21 .543 .498 13 226 206 25-21 .546
15 Oakland Athletics .505 25 23 .521 .499 17 218 209 25-23 .521
16 Washington Nationals .503 24 23 .511 .500 10 159 185 20-27 .425
17 Toronto Blue Jays .498 19 27 .413 .527 24 191 234 18-28 .400
18 Kansas City Royals .496 21 22 .488 .498 16 184 169 23-20 .542
19 Milwaukee Brewers .495 18 27 .400 .527 25 185 221 19-26 .412
20 Minnesota Twins .492 18 25 .419 .516 21 188 209 19-24 .447
21 Philadelphia Phillies .490 23 24 .489 .491 19 167 198 20-27 .416
22 Chicago White Sox .481 21 24 .467 .485 20 166 181 21-24 .457
23 San Diego Padres .479 21 25 .457 .486 22 185 205 21-25 .449
24 Chicago Cubs .477 18 27 .400 .503 27 177 182 22-23 .486
25 Seattle Mariners .477 20 27 .426 .494 18 169 209 19-28 .395
26 Los Angeles Dodgers .472 19 26 .422 .489 23 156 188 18-27 .408
27 Los Angeles Angels .466 19 27 .413 .483 26 208 228 21-25 .454
28 New York Mets .457 17 27 .386 .480 28 181 217 18-26 .410
29 Houston Astros .453 14 33 .298 .504 29 185 274 15-32 .313
30 Miami Marlins .424 13 34 .277 .473 30 125 201 13-34 .279
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.