2014 MLB Relative Power Index (RPI),as of the games of August 12,2014

MLB RPI Rankings
RK	TEAM	RPI	W	L	PCT	SOS	PWR	RS	RA	EXPW-L	EXPWP
1	Oakland Athletics	.530	73	46	.613	.502	1	586	411	80-39	.670
2	Baltimore Orioles	.526	68	50	.576	.510	5	513	457	66-52	.558
3	Los Angeles Angels	.526	69	49	.585	.506	2	558	473	69-49	.582
4	Kansas City Royals	.516	64	54	.542	.507	10	478	460	61-57	.519
5	Seattle Mariners	.513	64	55	.538	.505	13	471	384	71-48	.601
6	Detroit Tigers	.513	63	54	.538	.504	4	536	499	63-54	.536
7	Toronto Blue Jays	.512	63	58	.521	.509	14	542	526	62-59	.515
8	Los Angeles Dodgers	.511	69	52	.570	.491	3	498	440	68-53	.562
9	St. Louis Cardinals	.510	62	56	.525	.504	11	436	447	58-60	.488
10	Milwaukee Brewers	.508	66	54	.550	.494	7	515	482	64-56	.533
11	New York Yankees	.508	61	57	.517	.505	12	471	504	55-63	.466
12	Pittsburgh Pirates	.507	64	55	.538	.497	8	505	489	61-58	.516
13	Washington Nationals	.506	64	53	.547	.492	6	492	407	69-48	.594
14	Cleveland Indians	.504	59	59	.500	.505	18	522	513	60-58	.509
15	Tampa Bay Rays	.504	58	61	.487	.509	17	467	458	61-58	.510
16	Cincinnati Reds	.502	60	59	.504	.501	16	452	423	63-56	.533
17	San Francisco Giants	.500	62	57	.521	.493	9	458	436	62-57	.525
18	Atlanta Braves	.495	60	59	.504	.492	15	441	444	59-60	.497
19	Miami Marlins	.493	59	60	.496	.493	19	478	509	56-63	.469
20	Boston Red Sox	.492	53	65	.449	.507	24	447	503	52-66	.441
21	Chicago White Sox	.492	57	63	.475	.497	21	510	564	54-66	.450
22	New York Mets	.492	57	63	.475	.497	20	460	464	59-61	.496
23	Minnesota Twins	.491	53	65	.449	.504	23	497	536	55-63	.462
24	Houston Astros	.487	50	70	.417	.511	28	476	566	50-70	.414
25	San Diego Padres	.487	56	62	.475	.491	22	382	394	57-61	.485
26	Philadelphia Phillies	.479	53	67	.442	.492	26	463	538	51-69	.425
27	Chicago Cubs	.478	51	67	.432	.494	25	455	501	53-65	.452
28	Texas Rangers	.477	47	72	.395	.504	29	479	601	46-73	.388
29	Arizona Diamondbacks	.477	51	67	.432	.492	27	476	559	50-68	.420
30	Colorado Rockies	.465	46	73	.387	.491	30	549	625	52-67	.436

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.