MLB Relative Power Index (RPI) - 2013

Season:
MLB RPI Rankings
RK TEAM RPI W L PCT SOS PWR RS RA EXPW-L EXPWP
1 Milwaukee Brewers .495 18 27 .400 .527 25 185 221 19-26 .412
2 Toronto Blue Jays .500 20 27 .426 .525 24 203 240 20-27 .417
3 Colorado Rockies .528 26 21 .553 .519 15 231 199 27-20 .574
4 Tampa Bay Rays .519 24 22 .522 .518 14 222 211 24-22 .525
5 Arizona Diamondbacks .526 26 21 .553 .517 8 190 165 27-20 .570
6 St. Louis Cardinals .550 30 16 .652 .516 2 218 159 30-16 .653
7 New York Yankees .538 28 18 .609 .514 4 195 172 26-20 .562
8 Minnesota Twins .488 18 26 .409 .514 21 194 216 20-24 .446
9 San Francisco Giants .521 26 21 .553 .510 11 215 211 24-23 .509
10 Houston Astros .454 14 33 .298 .507 29 185 274 15-32 .313
11 Atlanta Braves .530 28 18 .609 .504 9 204 160 28-18 .619
12 Chicago Cubs .476 18 28 .391 .504 27 179 186 22-24 .481
13 Washington Nationals .503 24 23 .511 .500 10 159 185 20-27 .425
14 Cleveland Indians .522 27 19 .587 .500 7 238 200 27-19 .586
15 Oakland Athletics .505 25 23 .521 .500 17 218 209 25-23 .521
16 Boston Red Sox .519 28 20 .583 .497 5 231 202 27-21 .567
17 Kansas City Royals .492 21 23 .477 .496 16 188 174 24-20 .539
18 Seattle Mariners .479 20 27 .426 .496 18 169 209 19-28 .395
19 Baltimore Orioles .505 25 22 .532 .496 13 232 218 25-22 .531
20 Pittsburgh Pirates .524 29 18 .617 .493 12 186 163 27-20 .566
21 Detroit Tigers .513 26 19 .578 .491 6 245 189 28-17 .627
22 Philadelphia Phillies .491 23 24 .489 .491 19 167 198 20-27 .416
23 Los Angeles Dodgers .472 19 26 .422 .488 23 156 188 18-27 .408
24 Chicago White Sox .481 21 24 .467 .486 20 166 181 21-24 .457
25 Cincinnati Reds .518 29 18 .617 .485 3 225 168 30-17 .642
26 San Diego Padres .478 21 25 .457 .485 22 185 205 21-25 .449
27 Los Angeles Angels .468 20 27 .426 .483 26 213 232 21-26 .457
28 New York Mets .456 17 27 .386 .480 28 181 217 18-26 .410
29 Texas Rangers .515 30 17 .638 .474 1 217 169 29-18 .622
30 Miami Marlins .423 13 34 .277 .472 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.