2014 MLB Relative Power Index (RPI), as of the games of June 12,2014 from ESPN.GO.COM

MLB RPI Rankings
RK	TEAM	RPI	W	L	PCT	SOS	PWR	RS	RA	EXPW-L	EXPWP
1	Oakland Athletics	.536	40	26	.606	.512	2	336	206	48-18	.727
2	San Francisco Giants	.531	43	24	.642	.494	1	288	229	41-26	.613
3	Los Angeles Angels	.519	36	29	.554	.507	6	303	272	36-29	.554
4	Detroit Tigers	.518	34	28	.548	.508	5	276	270	32-30	.511
5	Milwaukee Brewers	.517	40	27	.597	.490	4	287	261	37-30	.547
6	Toronto Blue Jays	.516	39	29	.574	.497	3	323	290	38-30	.554
7	Seattle Mariners	.511	34	32	.515	.510	9	269	243	36-30	.551
8	Atlanta Braves	.511	34	31	.523	.507	7	233	233	33-33	.500
9	Washington Nationals	.509	35	30	.538	.499	8	274	230	38-27	.587
10	Baltimore Orioles	.507	34	31	.523	.502	12	278	277	33-32	.502
11	Minnesota Twins	.506	31	33	.484	.514	23	281	297	30-34	.472
12	Cleveland Indians	.504	33	34	.493	.508	16	303	312	33-34	.485
13	Kansas City Royals	.504	33	32	.508	.503	18	257	265	32-33	.485
14	St. Louis Cardinals	.503	34	32	.515	.498	13	247	233	35-31	.529
15	New York Yankees	.502	34	31	.523	.495	14	262	287	30-35	.455
16	Houston Astros	.501	31	37	.456	.517	26	265	301	30-38	.437
17	Los Angeles Dodgers	.500	35	33	.515	.494	10	287	264	37-31	.542
18	Texas Rangers	.499	32	34	.485	.504	17	283	321	29-37	.437
19	Miami Marlins	.499	34	31	.523	.491	11	292	273	35-30	.534
20	Pittsburgh Pirates	.499	32	34	.485	.504	19	263	277	31-35	.474
21	Chicago White Sox	.495	33	34	.493	.496	15	298	313	32-35	.475
22	Boston Red Sox	.489	30	36	.455	.501	21	259	281	30-36	.459
23	Colorado Rockies	.486	31	35	.470	.491	22	335	323	34-32	.518
24	Cincinnati Reds	.485	31	34	.477	.487	20	225	242	30-35	.464
25	New York Mets	.482	29	37	.439	.496	24	260	267	32-34	.487
26	San Diego Padres	.480	28	38	.424	.499	25	200	256	25-41	.379
27	Philadelphia Phillies	.476	28	36	.438	.489	30	251	291	27-37	.427
28	Chicago Cubs	.473	26	38	.406	.496	27	245	260	30-34	.470
29	Arizona Diamondbacks	.472	29	40	.420	.490	28	283	337	29-40	.414
30	Tampa Bay Rays	.471	25	42	.373	.504	29	242	294	27-40	.404

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.