2017 MLB Relative Power Index (RPI),as of the games of May 26,2017 from ESPN.GO.COM

MLB RPI Rankings

RK	TEAM	RPI	W	L	PCT	SOS	PWR	RS	RA	EXPW-L	EXPWP
1	Colorado Rockies	.547	32	18	.640	.516	0	259	215	30-20	.592
2	Houston Astros	.540	33	16	.673	.496	0	239	180	31-18	.638
3	New York Yankees	.537	27	18	.600	.516	0	242	189	28-17	.621
4	Baltimore Orioles	.531	25	21	.543	.527	0	207	207	23-23	.500
5	Arizona Diamondbacks	.527	31	19	.620	.496	0	252	192	32-18	.633
6	Boston Red Sox	.522	26	21	.553	.512	0	225	200	26-21	.559
7	Minnesota Twins	.521	25	19	.568	.505	0	199	198	22-22	.503
8	Los Angeles Dodgers	.520	29	20	.592	.496	0	242	174	32-17	.659
9	Cleveland Indians	.517	24	22	.522	.516	0	200	190	24-22	.526
10	Chicago Cubs	.515	25	22	.532	.509	0	231	213	25-22	.540
11	Tampa Bay Rays	.511	26	25	.510	.512	0	232	206	29-22	.559
12	St. Louis Cardinals	.508	23	22	.511	.506	0	196	189	23-22	.518
13	Detroit Tigers	.507	22	25	.468	.520	0	222	240	22-25	.461
14	Milwaukee Brewers	.507	25	23	.521	.502	0	242	226	26-22	.534
15	Washington Nationals	.504	29	18	.617	.467	0	268	212	29-18	.615
16	Cincinnati Reds	.494	23	24	.489	.496	0	239	235	24-23	.508
17	Toronto Blue Jays	.493	22	26	.458	.505	0	205	215	23-25	.476
18	Chicago White Sox	.492	21	25	.457	.504	0	212	191	25-21	.552
19	Los Angeles Angels	.492	25	26	.490	.492	0	206	218	24-27	.472
20	Pittsburgh Pirates	.489	22	27	.449	.502	0	196	227	21-28	.427
21	San Francisco Giants	.488	20	30	.400	.518	0	166	237	16-34	.329
22	Kansas City Royals	.488	20	27	.426	.508	0	159	203	18-29	.380
23	Texas Rangers	.487	24	25	.490	.486	0	233	223	26-23	.522
24	Oakland Athletics	.486	22	25	.468	.492	0	193	232	19-28	.409
25	Seattle Mariners	.479	21	28	.429	.496	0	212	246	21-28	.426
26	San Diego Padres	.471	18	32	.360	.508	0	172	265	15-35	.296
27	Philadelphia Phillies	.464	16	30	.348	.503	0	192	231	19-27	.409
28	Atlanta Braves	.462	21	25	.457	.463	0	210	239	20-26	.436
29	Miami Marlins	.449	17	29	.370	.476	0	198	240	19-27	.405
30	New York Mets	.446	20	26	.435	.449	0	235	251	21-25	.467

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.