2016 MLB Relative Power Index (RPI),as of the games of May 14,2016 from ESPN.GO.COM

MLB RPI Rankings
RK	TEAM	RPI	W	L	PCT	SOS	PWR	RS	RA	EXPW-L	EXPWP
1	Chicago Cubs	.569	27	8	.771	.502	0	213	103	28-7	.810
2	Chicago White Sox	.537	24	13	.649	.499	0	163	123	24-13	.637
3	Baltimore Orioles	.534	23	12	.657	.492	0	165	127	22-13	.628
4	Washington Nationals	.532	23	14	.622	.502	0	160	120	24-13	.640
5	Toronto Blue Jays	.529	19	19	.500	.538	0	155	135	22-16	.569
6	Philadelphia Phillies	.527	22	15	.595	.504	0	122	147	15-22	.408
7	Texas Rangers	.526	21	16	.568	.513	0	172	162	20-17	.530
8	Boston Red Sox	.521	23	14	.622	.487	0	219	161	24-13	.649
9	Miami Marlins	.514	19	17	.528	.509	0	149	154	17-19	.484
10	New York Mets	.513	21	15	.583	.490	0	149	114	23-13	.631
11	Tampa Bay Rays	.513	16	18	.471	.527	0	122	128	16-18	.476
12	Los Angeles Dodgers	.507	20	17	.541	.495	0	159	136	21-16	.577
13	Colorado Rockies	.506	18	18	.500	.509	0	188	189	18-18	.497
14	San Diego Padres	.504	17	21	.447	.523	0	142	163	16-22	.431
15	San Francisco Giants	.504	21	18	.538	.493	0	179	177	20-19	.506
16	Cincinnati Reds	.502	14	22	.389	.540	0	144	199	12-24	.344
17	St. Louis Cardinals	.500	19	18	.514	.495	0	207	161	23-14	.623
18	Pittsburgh Pirates	.499	18	17	.514	.494	0	169	172	17-18	.491
19	Seattle Mariners	.499	21	15	.583	.471	0	165	136	21-15	.595
20	New York Yankees	.492	15	20	.429	.514	0	130	154	15-20	.416
21	Arizona Diamondbacks	.489	17	22	.436	.507	0	174	192	18-21	.451
22	Cleveland Indians	.488	17	16	.515	.479	0	142	130	18-15	.544
23	Los Angeles Angels	.484	15	21	.417	.506	0	139	165	15-21	.415
24	Oakland Athletics	.480	15	22	.405	.504	0	138	190	13-24	.345
25	Kansas City Royals	.469	17	19	.472	.468	0	127	147	15-21	.427
26	Detroit Tigers	.463	15	21	.417	.478	0	150	170	16-20	.438
27	Atlanta Braves	.460	9	26	.257	.527	0	107	169	10-25	.286
28	Houston Astros	.459	15	23	.395	.480	0	157	182	16-22	.427
29	Milwaukee Brewers	.459	15	22	.405	.476	0	164	203	15-22	.395
30	Minnesota Twins	.433	9	26	.257	.491	0	123	184	11-24	.309

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.