2014 MLB Relative Power Index (RPI),as of the games of September 13,2014

MLB RPI Rankings
RK	TEAM	RPI	W	L	PCT	SOS	PWR	RS	RA	EXPW-L	EXPWP
1	Los Angeles Angels	.534	93	55	.628	.502	1	728	566	92-56	.623
2	Baltimore Orioles	.527	88	60	.595	.504	2	647	548	86-62	.582
3	Oakland Athletics	.519	82	66	.554	.507	5	681	523	93-55	.629
4	Detroit Tigers	.516	82	66	.554	.503	10	697	644	80-68	.539
5	Washington Nationals	.515	84	63	.571	.496	3	633	518	88-59	.599
6	St. Louis Cardinals	.513	82	67	.550	.501	7	574	567	75-74	.506
7	Kansas City Royals	.513	81	66	.551	.500	6	589	565	77-70	.521
8	Los Angeles Dodgers	.512	84	64	.568	.493	4	622	542	84-64	.568
9	Seattle Mariners	.511	80	67	.544	.500	9	580	476	88-59	.598
10	Toronto Blue Jays	.509	77	70	.524	.504	16	662	627	77-70	.527
11	New York Yankees	.507	76	71	.517	.503	14	575	603	70-77	.476
12	Cleveland Indians	.505	76	71	.517	.502	11	619	611	74-73	.507
13	Pittsburgh Pirates	.505	78	70	.527	.498	13	628	598	78-70	.524
14	San Francisco Giants	.504	82	66	.554	.488	8	621	554	82-66	.557
15	Tampa Bay Rays	.501	71	78	.477	.509	18	572	569	75-74	.503
16	Milwaukee Brewers	.500	77	72	.517	.494	15	616	623	74-75	.494
17	Atlanta Braves	.499	75	73	.507	.497	12	542	536	75-73	.506
18	New York Mets	.495	72	77	.483	.499	20	573	582	73-76	.492
19	Cincinnati Reds	.494	71	78	.477	.500	21	557	561	74-75	.496
20	Houston Astros	.492	65	83	.439	.510	27	582	677	63-85	.425
21	Philadelphia Phillies	.492	69	79	.466	.501	22	579	637	67-81	.452
22	Miami Marlins	.491	71	76	.483	.494	17	597	616	71-76	.484
23	Chicago White Sox	.491	68	80	.459	.501	25	610	697	64-84	.434
24	Boston Red Sox	.490	65	84	.436	.507	24	572	657	64-85	.431
25	Minnesota Twins	.485	62	86	.419	.507	26	646	716	66-82	.449
26	San Diego Padres	.483	68	79	.463	.490	19	475	525	66-81	.450
27	Chicago Cubs	.482	65	83	.439	.496	23	559	642	64-84	.431
28	Texas Rangers	.475	56	92	.378	.508	30	569	732	56-92	.377
29	Arizona Diamondbacks	.471	60	88	.405	.493	28	564	673	61-87	.413
30	Colorado Rockies	.469	59	89	.399	.492	29	670	754	65-83	.441

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.