2014 MLB Relative Power Index (RPI),as of the games of September 23,2014

MLB RPI Rankings
RK	TEAM	RPI	W	L	PCT	SOS	PWR	RS	RA	EXPW-L	EXPWP
1	Los Angeles Angels	.529	97	61	.614	.501	1	763	616	96-62	.605
2	Baltimore Orioles	.528	94	63	.599	.505	3	686	574	92-65	.588
3	Washington Nationals	.518	92	64	.590	.495	2	662	532	95-61	.608
4	Detroit Tigers	.516	87	70	.554	.503	6	737	679	85-72	.541
5	St. Louis Cardinals	.515	88	70	.557	.501	5	608	589	82-76	.516
6	Oakland Athletics	.515	86	71	.548	.504	9	710	558	97-60	.618
7	Kansas City Royals	.512	86	71	.548	.501	10	628	605	81-76	.519
8	Los Angeles Dodgers	.512	90	68	.570	.492	4	686	602	89-69	.565
9	Pittsburgh Pirates	.510	86	71	.548	.498	8	660	609	85-72	.540
10	Seattle Mariners	.509	83	74	.529	.502	11	617	543	88-69	.564
11	New York Yankees	.507	81	76	.516	.504	14	606	633	75-82	.478
12	Toronto Blue Jays	.506	80	77	.510	.504	15	709	674	82-75	.525
13	Cleveland Indians	.505	82	76	.519	.500	12	655	645	80-78	.508
14	San Francisco Giants	.502	85	72	.541	.489	7	642	589	85-72	.543
15	Tampa Bay Rays	.502	76	81	.484	.507	16	604	595	80-77	.508
16	Milwaukee Brewers	.500	80	77	.510	.497	13	634	640	78-79	.495
17	New York Mets	.495	76	81	.484	.498	18	611	604	79-78	.506
18	Atlanta Braves	.494	76	81	.484	.498	17	556	577	76-81	.481
19	Cincinnati Reds	.492	73	84	.465	.501	22	575	594	76-81	.484
20	Chicago White Sox	.491	72	85	.459	.502	21	646	733	69-88	.437
21	Houston Astros	.490	69	89	.437	.508	26	621	707	69-89	.436
22	Miami Marlins	.490	75	81	.481	.494	19	622	651	74-82	.477
23	Boston Red Sox	.489	68	89	.433	.508	24	595	695	66-91	.423
24	Philadelphia Phillies	.488	71	86	.452	.500	23	605	670	71-86	.449
25	San Diego Padres	.486	75	82	.478	.489	20	515	552	73-84	.465
26	Minnesota Twins	.486	67	90	.427	.506	27	688	762	71-86	.449
27	Chicago Cubs	.485	70	88	.443	.499	25	599	698	67-91	.424
28	Texas Rangers	.482	64	93	.408	.507	29	623	757	63-94	.404
29	Colorado Rockies	.474	66	92	.418	.493	28	738	791	74-84	.465
30	Arizona Diamondbacks	.469	63	95	.399	.492	30	603	730	64-94	.406

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.