2014 MLB Relative Power Index (RPI),as of the games of September 27,2014

MLB RPI Rankings
RK	TEAM	RPI	W	L	PCT	SOS	PWR	RS	RA	EXPW-L	EXPWP
1	Los Angeles Angels	.529	98	63	.609	.502	1	772	626	97-64	.603
2	Baltimore Orioles	.526	95	66	.590	.505	3	704	593	94-67	.585
3	Washington Nationals	.519	95	66	.590	.495	2	685	555	97-64	.604
4	Detroit Tigers	.515	89	72	.553	.502	6	754	705	86-75	.534
5	Los Angeles Dodgers	.513	93	68	.578	.492	4	708	612	92-69	.572
6	St. Louis Cardinals	.513	89	72	.553	.500	5	618	603	82-79	.512
7	Oakland Athletics	.513	87	74	.540	.503	9	725	572	99-62	.616
8	Kansas City Royals	.512	88	73	.547	.501	10	645	620	84-77	.520
9	Seattle Mariners	.511	86	75	.534	.503	11	630	553	91-70	.565
10	Pittsburgh Pirates	.509	88	73	.547	.497	8	681	627	87-74	.541
11	Toronto Blue Jays	.508	83	78	.516	.505	15	723	685	85-76	.527
12	New York Yankees	.507	83	78	.516	.504	14	624	659	76-85	.473
13	Cleveland Indians	.506	84	77	.522	.501	12	662	651	82-79	.508
14	San Francisco Giants	.502	87	74	.540	.489	7	656	611	86-75	.535
15	Tampa Bay Rays	.500	77	84	.478	.507	16	610	618	79-82	.493
16	Milwaukee Brewers	.499	82	79	.509	.496	13	648	652	80-81	.497
17	New York Mets	.495	78	83	.484	.498	18	621	615	81-80	.505
18	Atlanta Braves	.494	78	83	.484	.498	17	571	596	77-84	.479
19	Cincinnati Reds	.492	75	86	.466	.501	22	591	611	78-83	.483
20	Boston Red Sox	.491	71	90	.441	.508	24	629	706	71-90	.443
21	Chicago White Sox	.490	73	88	.453	.503	21	656	752	70-91	.432
22	Miami Marlins	.490	77	84	.478	.494	19	645	673	77-84	.479
23	Houston Astros	.489	70	91	.435	.508	26	626	715	70-91	.434
24	Minnesota Twins	.488	70	91	.435	.506	27	715	774	74-87	.460
25	Philadelphia Phillies	.488	73	88	.453	.500	23	618	685	72-89	.449
26	San Diego Padres	.487	77	84	.478	.490	20	532	568	75-86	.467
27	Chicago Cubs	.486	72	89	.447	.499	25	609	705	69-92	.427
28	Texas Rangers	.484	67	94	.416	.507	29	637	769	66-95	.407
29	Colorado Rockies	.472	66	95	.410	.493	28	750	808	75-86	.463
30	Arizona Diamondbacks	.469	64	97	.398	.493	30	615	741	66-95	.408

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.