2017 MLB Relative Power Index (RPI),as of the games of June 5,2017 from ESPN.GO.COM

MLB RPI Rankings

RK	TEAM	RPI	W	L	PCT	SOS	PWR	RS	RA	EXPW-L	EXPWP
1	Houston Astros	.560	42	16	.724	.506	0	319	213	40-18	.692
2	Baltimore Orioles	.535	29	26	.527	.537	0	244	253	27-28	.482
3	Colorado Rockies	.531	36	23	.610	.505	0	300	256	34-25	.579
4	New York Yankees	.530	32	22	.593	.509	0	294	224	34-20	.633
5	Los Angeles Dodgers	.520	35	24	.593	.495	0	285	203	39-20	.663
6	Boston Red Sox	.518	31	25	.554	.506	0	271	233	32-24	.575
7	Minnesota Twins	.517	29	24	.547	.506	0	246	265	25-28	.463
8	Arizona Diamondbacks	.514	34	25	.576	.494	0	283	234	35-24	.594
9	Washington Nationals	.512	36	20	.643	.469	0	318	246	35-21	.626
10	Cleveland Indians	.511	29	26	.527	.506	0	248	222	31-24	.555
11	Tampa Bay Rays	.510	29	30	.492	.516	0	272	267	30-29	.509
12	Detroit Tigers	.506	28	28	.500	.507	0	277	276	28-28	.502
13	Seattle Mariners	.504	28	30	.483	.511	0	269	274	28-30	.491
14	Chicago Cubs	.502	29	27	.518	.497	0	258	252	29-27	.512
15	Milwaukee Brewers	.500	30	28	.517	.494	0	286	262	32-26	.544
16	Toronto Blue Jays	.499	28	30	.483	.504	0	252	260	28-30	.484
17	St. Louis Cardinals	.498	26	29	.473	.506	0	225	231	27-28	.487
18	Los Angeles Angels	.494	29	31	.483	.497	0	243	259	28-32	.468
19	Oakland Athletics	.491	25	32	.439	.508	0	238	298	22-35	.389
20	Texas Rangers	.490	26	31	.456	.501	0	267	269	28-29	.496
21	Kansas City Royals	.489	24	32	.429	.509	0	197	251	21-35	.381
22	Chicago White Sox	.488	24	31	.436	.506	0	248	251	27-28	.494
23	Pittsburgh Pirates	.483	26	31	.456	.493	0	237	262	26-31	.450
24	San Diego Padres	.480	23	35	.397	.507	0	200	294	18-40	.316
25	San Francisco Giants	.479	24	35	.407	.503	0	210	269	22-37	.379
26	Cincinnati Reds	.478	26	30	.464	.483	0	280	294	27-29	.476
27	Miami Marlins	.472	24	32	.429	.487	0	249	268	26-30	.463
28	Atlanta Braves	.464	24	31	.436	.473	0	249	293	23-32	.419
29	Philadelphia Phillies	.464	20	35	.364	.497	0	230	287	22-33	.391
30	New York Mets	.458	24	31	.436	.466	0	269	298	25-30	.449

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.