2015 MLB Relative Power Index (RPI),as of the games of April 25,2015

MLB RPI Rankings
RK	TEAM	RPI	W	L	PCT	SOS	PWR	RS	RA	EXPW-L	EXPWP
1	New York Mets	.585	14	4	.778	.521	6	82	55	12-6	.690
2	New York Yankees	.569	10	8	.556	.573	20	93	74	11-7	.612
3	Kansas City Royals	.556	12	4	.750	.491	2	84	51	12-4	.731
4	Chicago Cubs	.551	9	7	.563	.548	14	73	65	9-7	.558
5	Los Angeles Dodgers	.550	11	6	.647	.517	3	83	66	10-7	.613
6	Atlanta Braves	.544	9	8	.529	.549	16	65	63	9-8	.516
7	Detroit Tigers	.542	12	6	.667	.501	1	82	70	10-8	.578
8	Tampa Bay Rays	.535	10	8	.556	.528	21	76	75	9-9	.507
9	San Diego Padres	.533	10	9	.526	.536	7	93	77	11-8	.593
10	St. Louis Cardinals	.533	12	4	.750	.461	5	63	35	12-4	.764
11	Minnesota Twins	.522	7	10	.412	.559	28	56	79	6-11	.334
12	Toronto Blue Jays	.519	9	9	.500	.526	10	99	91	10-8	.542
13	Colorado Rockies	.508	10	8	.556	.493	8	77	80	9-9	.481
14	Cincinnati Reds	.496	8	9	.471	.505	17	66	73	8-9	.450
15	Boston Red Sox	.492	10	8	.556	.471	4	88	84	9-9	.523
16	Baltimore Orioles	.492	8	10	.444	.508	9	86	95	8-10	.450
17	Chicago White Sox	.484	6	9	.400	.512	23	52	64	6-9	.398
18	Arizona Diamondbacks	.482	8	9	.471	.486	22	71	67	9-8	.529
19	Los Angeles Angels	.482	9	9	.500	.476	12	71	69	9-9	.514
20	Miami Marlins	.479	7	11	.389	.509	27	79	76	9-9	.519
21	San Francisco Giants	.476	8	11	.421	.495	26	58	78	7-12	.356
22	Pittsburgh Pirates	.476	10	8	.556	.450	15	71	60	11-7	.583
23	Houston Astros	.472	10	7	.588	.434	25	63	58	9-8	.541
24	Oakland Athletics	.468	8	11	.421	.484	11	90	78	11-8	.571
25	Seattle Mariners	.460	7	10	.412	.476	18	65	85	6-11	.369
26	Washington Nationals	.457	7	11	.389	.480	13	63	75	7-11	.414
27	Cleveland Indians	.457	6	10	.375	.484	19	58	63	7-9	.459
28	Philadelphia Phillies	.424	6	12	.333	.455	30	44	79	4-14	.237
29	Texas Rangers	.420	6	11	.353	.442	24	66	82	7-10	.393
30	Milwaukee Brewers	.407	3	15	.167	.487	29	49	99	4-14	.197

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.