2016 MLB Relative Power Index (RPI),as of the games of April 24,2016 from ESPN.GO.COM

MLB RPI Rankings
RK	TEAM	RPI	W	L	PCT	SOS	PWR	RS	RA	EXPW-L	EXPWP
1	Chicago Cubs	.612	14	5	.737	.570	0	119	51	16-3	.845
2	Chicago White Sox	.547	13	6	.684	.502	0	61	47	12-7	.627
3	Cincinnati Reds	.546	9	10	.474	.571	0	77	117	6-13	.302
4	Baltimore Orioles	.544	11	6	.647	.509	0	81	67	10-7	.594
5	Cleveland Indians	.534	9	7	.563	.524	0	71	62	9-7	.567
6	Kansas City Royals	.532	12	6	.667	.487	0	70	55	11-7	.618
7	Oakland Athletics	.530	10	9	.526	.531	0	66	70	9-10	.471
8	Arizona Diamondbacks	.529	10	10	.500	.539	0	97	98	10-10	.495
9	Colorado Rockies	.523	9	9	.500	.530	0	99	109	8-10	.452
10	Texas Rangers	.513	10	9	.526	.509	0	81	80	10-9	.506
11	New York Mets	.507	10	7	.588	.480	0	74	52	11-6	.669
12	Tampa Bay Rays	.504	8	10	.444	.524	0	65	67	9-9	.485
13	Seattle Mariners	.503	9	9	.500	.504	0	75	66	10-8	.564
14	Los Angeles Angels	.503	8	11	.421	.531	0	57	75	7-12	.366
15	Washington Nationals	.503	14	4	.778	.411	0	79	45	14-4	.755
16	Philadelphia Phillies	.502	9	10	.474	.512	0	62	88	6-13	.332
17	Boston Red Sox	.500	9	9	.500	.501	0	90	90	9-9	.500
18	St. Louis Cardinals	.498	10	8	.556	.479	0	111	71	13-5	.710
19	Toronto Blue Jays	.497	10	10	.500	.496	0	85	76	11-9	.556
20	Los Angeles Dodgers	.496	12	7	.632	.451	0	94	71	12-7	.637
21	San Francisco Giants	.495	9	11	.450	.510	0	99	89	11-9	.553
22	Pittsburgh Pirates	.484	10	9	.526	.470	0	95	94	10-9	.505
23	Miami Marlins	.484	6	11	.353	.528	0	63	78	7-10	.395
24	Detroit Tigers	.479	8	9	.471	.482	0	72	75	8-9	.480
25	San Diego Padres	.468	7	12	.368	.501	0	72	101	6-13	.337
26	Minnesota Twins	.460	5	14	.263	.525	0	62	83	7-12	.358
27	New York Yankees	.447	7	10	.412	.459	0	66	78	7-10	.417
28	Atlanta Braves	.442	4	14	.222	.515	0	61	92	5-13	.305
29	Houston Astros	.432	6	13	.316	.470	0	76	96	7-12	.385
30	Milwaukee Brewers	.426	8	11	.421	.428	0	76	113	6-13	.311

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.