2014 MLB Relative Power Index (RPI),as of the games of September 6,2014 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	86	55	.610	.503	1	662	547	84-57	.594
2	Baltimore Orioles	.523	82	59	.582	.504	3	613	532	80-61	.570
3	Oakland Athletics	.522	80	61	.567	.507	4	657	503	89-52	.630
4	Kansas City Royals	.514	78	62	.557	.500	6	565	541	73-67	.522
5	St. Louis Cardinals	.514	78	64	.549	.503	12	543	547	70-72	.496
6	Seattle Mariners	.514	78	63	.553	.500	10	567	462	85-56	.601
7	Washington Nationals	.513	79	61	.564	.496	2	601	496	83-57	.595
8	Los Angeles Dodgers	.512	80	62	.563	.494	5	582	521	79-63	.555
9	Detroit Tigers	.511	77	65	.542	.501	7	666	627	75-67	.530
10	Toronto Blue Jays	.506	72	69	.511	.504	16	625	619	71-70	.505
11	New York Yankees	.506	73	67	.521	.501	14	555	579	67-73	.479
12	Cleveland Indians	.506	73	67	.521	.501	15	595	581	72-68	.512
13	San Francisco Giants	.504	78	64	.549	.489	9	595	528	79-63	.559
14	Pittsburgh Pirates	.504	73	68	.518	.499	11	588	573	72-69	.513
15	Atlanta Braves	.503	74	68	.521	.498	13	528	517	72-70	.511
16	Milwaukee Brewers	.502	74	68	.521	.495	8	596	592	71-71	.503
17	Tampa Bay Rays	.501	69	74	.483	.507	17	550	540	73-70	.509
18	New York Mets	.494	67	75	.472	.502	21	553	558	70-72	.495
19	Cincinnati Reds	.493	67	75	.472	.500	20	533	541	70-72	.493
20	Miami Marlins	.492	68	72	.486	.495	18	576	596	68-72	.483
21	Philadelphia Phillies	.492	66	75	.468	.500	23	560	613	64-77	.455
22	Houston Astros	.490	62	80	.437	.508	27	565	651	61-81	.430
23	Boston Red Sox	.489	63	79	.444	.505	25	553	624	62-80	.440
24	Chicago White Sox	.487	63	78	.447	.501	22	588	672	61-80	.434
25	Minnesota Twins	.487	61	81	.430	.506	26	629	677	66-76	.463
26	San Diego Padres	.486	66	75	.468	.492	19	455	488	66-75	.465
27	Chicago Cubs	.484	64	78	.451	.496	24	543	593	65-77	.456
28	Arizona Diamondbacks	.474	59	83	.415	.494	28	544	640	60-82	.419
29	Texas Rangers	.473	53	89	.373	.506	30	556	705	54-88	.383
30	Colorado Rockies	.472	58	84	.408	.493	29	657	737	63-79	.443

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.