MLB Relative Power Index (RPI) - 2015

MLB RPI Rankings
RK	TEAM	RPI	W	L	PCT	SOS	PWR	RS	RA	EXPW-L	EXPWP
1	Detroit Tigers	.911	4	0	1.000	.882	6	30	5	4-0	.973
2	Atlanta Braves	.880	4	0	1.000	.840	27	21	6	4-0	.925
3	Cincinnati Reds	.849	4	0	1.000	.799	22	18	12	3-1	.692
4	Boston Red Sox	.818	3	1	.750	.840	12	22	11	3-1	.800
5	Cleveland Indians	.706	2	2	.500	.774	9	11	11	2-2	.500
6	Philadelphia Phillies	.703	2	2	.500	.771	30	10	17	1-3	.257
7	Minnesota Twins	.656	1	3	.250	.792	26	7	22	0-4	.092
8	Miami Marlins	.651	1	3	.250	.785	14	13	25	1-3	.213
9	Pittsburgh Pirates	.648	1	3	.250	.781	4	14	15	2-2	.466
10	San Francisco Giants	.625	3	2	.600	.633	16	17	14	3-2	.596
11	New York Yankees	.604	1	3	.250	.722	18	13	21	1-3	.277
12	Arizona Diamondbacks	.562	2	2	.500	.583	29	17	19	2-2	.445
13	Texas Rangers	.553	2	3	.400	.604	25	14	25	1-4	.239
14	Kansas City Royals	.490	4	0	1.000	.319	15	25	9	4-0	.885
15	Colorado Rockies	.474	4	0	1.000	.299	28	25	7	4-0	.927
16	Chicago White Sox	.453	0	4	.000	.604	13	7	27	0-4	.063
17	Toronto Blue Jays	.453	3	1	.750	.354	11	27	13	3-1	.812
18	Milwaukee Brewers	.445	0	4	.000	.594	21	8	26	0-4	.086
19	Los Angeles Dodgers	.438	2	2	.500	.417	2	19	18	2-2	.527
20	Houston Astros	.429	2	2	.500	.406	23	8	8	2-2	.500
21	St. Louis Cardinals	.378	1	2	.333	.394	3	7	7	2-2	.500
22	San Diego Padres	.375	2	3	.400	.367	10	15	17	2-3	.438
23	Oakland Athletics	.363	3	2	.600	.284	19	32	13	4-1	.858
24	New York Mets	.323	2	2	.500	.264	17	13	11	2-2	.583
25	Chicago Cubs	.316	1	2	.333	.310	20	3	8	0-3	.123
26	Los Angeles Angels	.284	2	2	.500	.212	7	10	11	2-2	.452
27	Baltimore Orioles	.219	2	2	.500	.125	8	17	21	2-2	.396
28	Washington Nationals	.203	1	3	.250	.188	1	7	14	1-3	.200
29	Seattle Mariners	.176	1	3	.250	.151	5	7	20	0-4	.109
30	Tampa Bay Rays	.146	1	3	.250	.111	24	18	22	2-2	.401

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.