2014 MLB Relative Power Index (RPI),as of the games of September 24,2014 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	98	61	.616	.501	1	768	620	96-63	.605
2	Baltimore Orioles	.529	95	63	.601	.505	3	695	579	93-65	.590
3	Washington Nationals	.519	92	64	.590	.495	2	662	532	95-61	.608
4	Detroit Tigers	.517	88	70	.557	.503	6	743	680	86-72	.544
5	Oakland Athletics	.514	86	72	.544	.504	9	714	563	97-61	.617
6	St. Louis Cardinals	.514	88	71	.553	.501	5	609	592	82-77	.514
7	Los Angeles Dodgers	.512	91	68	.572	.493	4	695	603	91-68	.571
8	Kansas City Royals	.512	86	72	.544	.501	10	632	611	82-76	.517
9	Pittsburgh Pirates	.509	86	72	.544	.498	8	662	615	85-73	.537
10	Seattle Mariners	.508	83	75	.525	.502	11	617	544	89-69	.563
11	New York Yankees	.507	81	77	.513	.505	14	611	642	75-83	.475
12	Toronto Blue Jays	.506	81	77	.513	.504	15	710	674	83-75	.526
13	Cleveland Indians	.506	83	76	.522	.501	12	661	649	81-78	.509
14	San Francisco Giants	.501	85	73	.538	.489	7	643	598	85-73	.536
15	Tampa Bay Rays	.501	76	82	.481	.507	16	607	606	79-79	.501
16	Milwaukee Brewers	.500	81	77	.513	.496	13	639	640	79-79	.499
17	Atlanta Braves	.495	77	81	.487	.498	17	562	579	77-81	.485
18	New York Mets	.495	76	81	.484	.498	18	611	604	79-78	.506
19	Cincinnati Reds	.491	73	85	.462	.500	22	575	599	76-82	.480
20	Chicago White Sox	.491	72	86	.456	.502	21	647	739	69-89	.434
21	Boston Red Sox	.490	69	89	.437	.508	24	606	698	68-90	.430
22	Miami Marlins	.490	75	82	.478	.493	19	623	653	75-82	.477
23	Houston Astros	.489	69	90	.434	.508	26	622	712	69-90	.433
24	Philadelphia Phillies	.489	72	86	.456	.500	23	607	671	71-87	.450
25	San Diego Padres	.487	76	82	.481	.489	20	519	555	74-84	.467
26	Minnesota Twins	.487	68	90	.430	.506	27	690	763	71-87	.450
27	Chicago Cubs	.486	71	88	.447	.499	25	602	699	68-91	.426
28	Texas Rangers	.483	65	93	.411	.507	29	628	758	64-94	.407
29	Colorado Rockies	.473	66	93	.415	.492	28	741	795	74-85	.465
30	Arizona Diamondbacks	.468	63	96	.396	.492	30	604	732	64-95	.405

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.