2017 MLB Relative Power Index (RPI),as of the games of May 29,2017 from ESPN.GO.COM

MLB RPI Rankings

RK	TEAM	RPI	W	L	PCT	SOS	PWR	RS	RA	EXPW-L	EXPWP
1	Houston Astros	.547	36	16	.692	.499	0	268	194	34-18	.656
2	Colorado Rockies	.542	33	20	.623	.515	0	272	228	31-22	.587
3	New York Yankees	.536	29	19	.604	.514	0	256	199	30-18	.623
4	Baltimore Orioles	.532	26	23	.531	.532	0	216	222	24-25	.486
5	Los Angeles Dodgers	.526	32	20	.615	.496	0	261	179	35-17	.680
6	Arizona Diamondbacks	.523	31	22	.585	.503	0	261	211	32-21	.605
7	Minnesota Twins	.518	26	21	.553	.507	0	218	225	23-24	.484
8	Cleveland Indians	.517	26	23	.531	.513	0	217	199	27-22	.543
9	Tampa Bay Rays	.515	28	26	.519	.514	0	253	225	30-24	.558
10	Boston Red Sox	.515	27	23	.540	.506	0	235	210	28-22	.556
11	St. Louis Cardinals	.507	24	24	.500	.510	0	204	202	24-24	.505
12	Chicago Cubs	.506	25	25	.500	.509	0	237	232	26-24	.511
13	Milwaukee Brewers	.506	27	24	.529	.498	0	259	236	28-23	.546
14	Washington Nationals	.504	31	19	.620	.465	0	277	217	31-19	.620
15	Detroit Tigers	.503	24	27	.471	.513	0	239	260	23-28	.458
16	Chicago White Sox	.498	24	26	.480	.504	0	230	202	28-22	.565
17	Toronto Blue Jays	.496	24	27	.471	.504	0	226	221	26-25	.511
18	San Francisco Giants	.490	22	31	.415	.514	0	179	244	19-34	.350
19	Pittsburgh Pirates	.488	24	28	.462	.497	0	207	241	22-30	.425
20	Kansas City Royals	.488	21	29	.420	.510	0	172	225	18-32	.369
21	Cincinnati Reds	.488	24	26	.480	.490	0	252	260	24-26	.484
22	Los Angeles Angels	.487	26	28	.481	.489	0	216	235	25-29	.458
23	Seattle Mariners	.485	23	29	.442	.500	0	223	257	22-30	.430
24	Texas Rangers	.483	25	27	.481	.484	0	245	237	27-25	.517
25	Oakland Athletics	.481	22	28	.440	.495	0	203	249	20-30	.399
26	San Diego Padres	.476	20	33	.377	.509	0	182	273	16-37	.308
27	Atlanta Braves	.465	22	27	.449	.470	0	220	255	21-28	.427
28	Philadelphia Phillies	.461	17	32	.347	.500	0	201	246	20-29	.400
29	Miami Marlins	.458	19	30	.388	.482	0	213	248	21-28	.425
30	New York Mets	.454	22	27	.449	.456	0	250	260	24-25	.480

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.