2014 MLB Relative Power Index (RPI),as of the games of July 31,2014

MLB RPI Rankings
RK	TEAM	RPI	W	L	PCT	SOS	PWR	RS	RA	EXPW-L	EXPWP
1	Oakland Athletics	.530	66	41	.617	.501	1	535	373	72-35	.673
2	Los Angeles Angels	.528	64	43	.598	.505	2	518	428	64-43	.594
3	Baltimore Orioles	.520	60	47	.561	.507	7	452	422	57-50	.534
4	Toronto Blue Jays	.516	60	50	.545	.506	13	512	468	60-50	.545
5	Detroit Tigers	.515	58	47	.552	.503	3	491	453	57-48	.540
6	St. Louis Cardinals	.510	57	50	.533	.503	10	393	391	54-53	.503
7	Los Angeles Dodgers	.510	62	47	.569	.491	6	455	395	62-47	.570
8	Milwaukee Brewers	.508	60	49	.550	.493	5	471	442	58-51	.532
9	Washington Nationals	.507	58	48	.547	.494	4	442	376	61-45	.580
10	Kansas City Royals	.507	55	52	.514	.505	16	426	424	54-53	.502
11	Seattle Mariners	.507	56	52	.519	.503	15	414	361	61-47	.568
12	New York Yankees	.507	55	52	.514	.504	12	429	459	50-57	.466
13	Pittsburgh Pirates	.506	57	51	.528	.498	11	449	449	54-54	.500
14	San Francisco Giants	.503	58	50	.537	.492	8	419	398	57-51	.526
15	Tampa Bay Rays	.503	53	55	.491	.507	14	421	425	53-55	.495
16	Cleveland Indians	.502	53	55	.491	.506	18	479	475	54-54	.504
17	Atlanta Braves	.501	58	51	.532	.491	9	415	395	57-52	.525
18	Cincinnati Reds	.501	54	54	.500	.502	17	404	393	55-53	.514
19	New York Mets	.495	52	56	.481	.499	21	423	409	56-52	.517
20	Chicago White Sox	.495	53	56	.486	.497	20	474	486	53-56	.488
21	Miami Marlins	.492	53	55	.491	.493	19	443	463	52-56	.478
22	Boston Red Sox	.490	48	60	.444	.506	22	412	467	47-61	.438
23	Minnesota Twins	.489	48	59	.449	.502	24	435	480	48-59	.451
24	Houston Astros	.487	44	65	.404	.515	29	424	524	43-66	.396
25	Philadelphia Phillies	.483	48	61	.440	.497	25	426	488	47-62	.432
26	San Diego Padres	.481	48	60	.444	.494	23	340	372	49-59	.455
27	Texas Rangers	.480	43	65	.398	.508	30	437	554	41-67	.384
28	Arizona Diamondbacks	.480	48	61	.440	.493	26	437	506	47-62	.427
29	Chicago Cubs	.475	45	62	.421	.493	27	412	458	48-59	.447
30	Colorado Rockies	.473	44	64	.407	.495	28	506	560	49-59	.449

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.