2017 MLB Relative Power Index (RPI) as of the games of April 8,2017 from ESPN.GO.COM

MLB RPI Rankings

RK	TEAM	RPI	W	L	PCT	SOS	PWR	RS	RA	EXPW-L	EXPWP
1	Chicago White Sox	.819	2	2	.500	.925	0	21	13	3-1	.723
2	Minnesota Twins	.790	4	1	.800	.787	0	26	12	4-1	.824
3	Detroit Tigers	.781	3	1	.750	.792	0	18	20	2-2	.448
4	Colorado Rockies	.725	5	1	.833	.688	0	22	20	3-3	.548
5	Washington Nationals	.658	3	2	.600	.678	0	23	33	2-3	.327
6	Milwaukee Brewers	.658	2	4	.333	.767	0	25	28	3-3	.444
7	Los Angeles Dodgers	.646	3	3	.500	.694	0	30	16	5-1	.779
8	Baltimore Orioles	.617	4	0	1.000	.489	0	17	12	3-1	.667
9	Boston Red Sox	.615	2	2	.500	.653	0	14	13	2-2	.537
10	Miami Marlins	.557	3	2	.600	.542	0	25	16	4-1	.709
11	Arizona Diamondbacks	.550	5	1	.833	.456	0	45	27	4-2	.735
12	Oakland Athletics	.544	3	3	.500	.559	0	26	26	3-3	.500
13	Chicago Cubs	.524	3	2	.600	.499	0	23	17	3-2	.647
14	Philadelphia Phillies	.522	2	3	.400	.562	0	31	22	3-2	.665
15	Kansas City Royals	.520	2	3	.400	.560	0	17	25	2-3	.316
16	Cleveland Indians	.513	3	2	.600	.484	0	26	32	2-3	.398
17	Cincinnati Reds	.508	3	2	.600	.478	0	18	18	3-3	.500
18	Los Angeles Angels	.500	4	2	.667	.444	0	25	20	4-2	.610
19	St. Louis Cardinals	.487	2	3	.400	.516	0	19	17	3-2	.555
20	New York Yankees	.483	1	4	.200	.578	0	18	22	2-3	.401
21	Toronto Blue Jays	.483	1	4	.200	.578	0	18	21	2-3	.424
22	San Francisco Giants	.479	1	5	.167	.583	0	29	36	2-4	.394
23	San Diego Padres	.382	3	3	.500	.343	0	19	34	1-5	.238
24	Tampa Bay Rays	.367	4	2	.667	.267	0	26	24	3-3	.540
25	Texas Rangers	.307	1	4	.200	.342	0	25	32	2-3	.379
26	Pittsburgh Pirates	.302	2	2	.500	.236	0	14	16	2-2	.434
27	New York Mets	.223	2	3	.400	.164	0	16	20	2-3	.390
28	Houston Astros	.203	3	3	.500	.104	0	16	20	2-4	.390
29	Seattle Mariners	.160	1	5	.167	.157	0	13	22	2-4	.259
30	Atlanta Braves	.087	1	4	.200	.049	0	13	24	1-4	.227

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.