2014 MLB Relative Power Index (RPI),as of the games of July 19,2014 from ESPN.GO.COM

MLB RPI Rankings
RK	TEAM	RPI	W	L	PCT	SOS	PWR	RS	RA	EXPW-L	EXPWP
1	Oakland Athletics	.536	60	37	.619	.509	0	475	333	65-32	.670
2	Los Angeles Angels	.528	58	38	.604	.502	0	483	394	58-38	.600
3	Detroit Tigers	.518	53	41	.564	.503	0	444	407	51-43	.543
4	St. Louis Cardinals	.517	54	44	.551	.506	0	367	350	51-47	.524
5	Baltimore Orioles	.513	53	43	.552	.500	0	417	388	51-45	.536
6	Seattle Mariners	.511	52	45	.536	.502	0	383	326	56-41	.580
7	Cleveland Indians	.509	50	47	.515	.507	0	437	432	49-48	.506
8	Milwaukee Brewers	.509	54	44	.551	.495	0	430	416	51-47	.517
9	Toronto Blue Jays	.509	50	48	.510	.508	0	436	418	51-47	.521
10	Cincinnati Reds	.508	51	46	.526	.502	0	381	360	51-46	.528
11	New York Yankees	.508	49	47	.510	.507	0	386	416	44-52	.463
12	Washington Nationals	.508	52	43	.547	.495	0	397	333	56-39	.587
13	San Francisco Giants	.507	54	43	.557	.490	0	385	352	53-44	.545
14	Pittsburgh Pirates	.506	51	46	.526	.499	0	398	397	49-48	.501
15	Atlanta Braves	.505	53	44	.546	.492	0	369	356	50-47	.518
16	Kansas City Royals	.505	48	48	.500	.506	0	388	386	48-48	.503
17	Los Angeles Dodgers	.502	54	45	.545	.488	0	408	361	56-43	.561
18	Tampa Bay Rays	.495	46	53	.465	.505	0	388	406	47-52	.477
19	Boston Red Sox	.495	45	52	.464	.505	0	374	410	44-53	.454
20	Chicago White Sox	.495	47	51	.480	.500	0	418	439	47-51	.476
21	Minnesota Twins	.492	44	52	.458	.504	0	405	429	45-51	.471
22	New York Mets	.492	46	51	.474	.498	0	388	374	50-47	.518
23	Houston Astros	.486	40	58	.408	.511	0	373	463	39-59	.394
24	Philadelphia Phillies	.482	43	54	.443	.494	0	373	421	43-54	.440
25	Miami Marlins	.481	44	52	.458	.489	0	400	429	45-51	.465
26	Texas Rangers	.481	39	58	.402	.507	0	397	504	37-60	.383
27	Chicago Cubs	.478	40	56	.417	.499	0	373	410	43-53	.453
28	San Diego Padres	.477	42	55	.433	.492	0	289	334	42-55	.428
29	Arizona Diamondbacks	.476	42	56	.429	.492	0	390	454	42-56	.425
30	Colorado Rockies	.474	40	57	.412	.494	0	459	513	43-54	.445

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.