2014 MLB Relative Power Index (RPI),as of the games of August 30,2014 from ESPN.GO.COM

MLB RPI Rankings
RK	TEAM	RPI	W	L	PCT	SOS	PWR	RS	RA	EXPW-L	EXPWP
1	Los Angeles Angels	.530	82	53	.607	.504	2	630	519	80-55	.596
2	Baltimore Orioles	.524	78	56	.582	.505	4	575	501	76-58	.568
3	Oakland Athletics	.523	78	57	.578	.505	1	637	479	86-49	.639
4	Washington Nationals	.515	77	57	.575	.495	3	574	466	81-53	.603
5	Kansas City Royals	.513	74	61	.548	.502	6	552	530	70-65	.520
6	Detroit Tigers	.512	74	61	.548	.500	10	631	594	72-63	.530
7	Seattle Mariners	.510	72	62	.537	.501	8	532	438	80-54	.596
8	St. Louis Cardinals	.510	72	63	.533	.502	9	512	522	66-69	.490
9	Los Angeles Dodgers	.510	76	60	.559	.493	5	555	502	75-61	.550
10	Milwaukee Brewers	.507	73	62	.541	.496	7	575	550	70-65	.522
11	Pittsburgh Pirates	.507	71	64	.526	.500	13	568	555	69-66	.512
12	New York Yankees	.506	70	64	.522	.501	14	532	558	64-70	.476
13	Cleveland Indians	.506	70	64	.522	.500	17	576	552	70-64	.521
14	Toronto Blue Jays	.505	68	67	.504	.505	15	594	597	67-68	.497
15	Atlanta Braves	.504	71	65	.522	.498	12	513	488	71-65	.525
16	San Francisco Giants	.503	73	62	.541	.491	11	540	489	74-61	.549
17	Tampa Bay Rays	.501	66	70	.485	.506	18	534	516	70-66	.517
18	Miami Marlins	.494	66	68	.493	.495	16	544	570	64-70	.477
19	Cincinnati Reds	.494	65	71	.478	.499	19	512	504	69-67	.508
20	New York Mets	.492	63	73	.463	.502	20	514	528	66-70	.487
21	San Diego Padres	.491	64	70	.478	.495	21	441	458	64-70	.481
22	Philadelphia Phillies	.489	62	73	.459	.499	26	528	591	60-75	.444
23	Chicago White Sox	.488	61	75	.449	.501	23	570	651	59-77	.434
24	Boston Red Sox	.488	59	76	.437	.505	25	520	595	58-77	.433
25	Minnesota Twins	.488	59	76	.437	.505	22	586	631	63-72	.463
26	Houston Astros	.486	58	79	.423	.507	27	543	638	58-79	.420
27	Chicago Cubs	.484	61	75	.449	.495	24	517	569	62-74	.452
28	Texas Rangers	.476	53	82	.393	.504	30	540	671	53-82	.393
29	Arizona Diamondbacks	.475	56	79	.415	.494	28	522	624	56-79	.412
30	Colorado Rockies	.470	54	81	.400	.493	29	617	698	59-76	.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.