2014 MLB Relative Power Index (RPI),as of the games of August 28,2014 from ESPN.GO.COM

MLB RPI Rankings
RK	TEAM	RPI	W	L	PCT	SOS	PWR	RS	RA	EXPW-L	EXPWP
1	Los Angeles Angels	.528	80	53	.602	.504	2	624	519	79-54	.591
2	Oakland Athletics	.525	78	55	.586	.504	1	637	473	86-47	.645
3	Baltimore Orioles	.524	76	56	.576	.506	4	563	498	74-58	.561
4	Kansas City Royals	.516	74	59	.556	.502	6	549	521	70-63	.526
5	Washington Nationals	.513	75	57	.568	.494	3	563	462	79-53	.598
6	Detroit Tigers	.512	72	60	.545	.501	10	613	583	69-63	.525
7	Seattle Mariners	.512	72	60	.545	.501	8	528	427	80-52	.605
8	St. Louis Cardinals	.512	71	61	.538	.503	9	496	508	64-68	.488
9	Los Angeles Dodgers	.511	76	58	.567	.493	5	552	497	74-60	.552
10	Milwaukee Brewers	.508	73	60	.549	.495	7	572	534	71-62	.534
11	New York Yankees	.506	69	63	.523	.501	14	526	553	63-69	.475
12	Pittsburgh Pirates	.505	69	64	.519	.500	13	563	552	68-65	.510
13	Toronto Blue Jays	.505	67	66	.504	.505	15	589	591	66-67	.498
14	Cleveland Indians	.504	68	64	.515	.500	17	567	549	68-64	.516
15	Atlanta Braves	.504	70	64	.522	.497	12	508	482	71-63	.526
16	Tampa Bay Rays	.502	65	69	.485	.507	18	523	508	69-65	.515
17	San Francisco Giants	.501	71	62	.534	.490	11	524	486	71-62	.538
18	Cincinnati Reds	.495	65	69	.485	.498	19	509	499	68-66	.510
19	Miami Marlins	.493	65	67	.492	.494	16	538	565	63-69	.476
20	New York Mets	.492	62	72	.463	.502	20	508	520	65-69	.488
21	Minnesota Twins	.489	59	74	.444	.505	22	583	619	63-70	.470
22	Philadelphia Phillies	.489	61	72	.459	.499	26	520	585	59-74	.441
23	Chicago White Sox	.488	60	73	.451	.500	23	559	633	58-75	.438
24	Boston Red Sox	.488	58	75	.436	.505	25	512	584	58-75	.435
25	San Diego Padres	.488	62	70	.470	.494	21	436	455	63-69	.479
26	Houston Astros	.487	57	78	.422	.509	27	535	625	57-78	.423
27	Chicago Cubs	.482	59	74	.444	.495	24	503	553	60-73	.453
28	Texas Rangers	.477	52	81	.391	.506	30	527	663	51-82	.387
29	Arizona Diamondbacks	.475	55	78	.414	.495	28	517	620	55-78	.410
30	Colorado Rockies	.470	53	80	.398	.493	29	613	693	58-75	.439

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.