2016 MLB Relative Power Index (RPI),as of the games of September 10,2016 from ESPN.GO.COM

MLB RPI Rankings

RK	TEAM	RPI	W	L	PCT	SOS	PWR	RS	RA	EXPW-L	EXPWP
1	Texas Rangers	.530	85	58	.594	.508	0	695	673	74-69	.516
2	Chicago Cubs	.529	90	51	.638	.493	0	700	478	96-45	.682
3	Cleveland Indians	.520	82	59	.582	.499	0	693	590	82-59	.580
4	Baltimore Orioles	.519	77	64	.546	.510	0	674	641	74-67	.525
5	Toronto Blue Jays	.519	78	63	.553	.507	0	681	594	80-61	.568
6	Washington Nationals	.518	84	58	.592	.494	0	675	531	88-54	.618
7	Boston Red Sox	.517	79	62	.560	.503	0	779	619	86-55	.613
8	New York Yankees	.515	76	65	.539	.507	0	603	608	70-71	.496
9	Detroit Tigers	.513	76	65	.539	.504	0	648	635	72-69	.510
10	Houston Astros	.510	75	67	.528	.505	0	649	607	76-66	.533
11	Seattle Mariners	.510	74	68	.521	.507	0	679	641	75-67	.529
12	Kansas City Royals	.510	73	68	.518	.507	0	586	594	70-71	.493
13	Los Angeles Dodgers	.508	80	61	.567	.488	0	634	557	80-61	.564
14	New York Mets	.503	75	67	.528	.495	0	561	540	74-68	.519
15	St. Louis Cardinals	.503	75	66	.532	.494	0	696	618	79-62	.559
16	San Francisco Giants	.503	76	65	.539	.491	0	629	565	78-63	.553
17	Chicago White Sox	.500	68	73	.482	.506	0	591	623	67-74	.474
18	Pittsburgh Pirates	.495	69	71	.493	.496	0	628	640	69-71	.491
19	Miami Marlins	.492	70	72	.493	.491	0	579	584	70-72	.496
20	Los Angeles Angels	.491	62	79	.440	.509	0	633	655	68-73	.483
21	Colorado Rockies	.490	68	74	.479	.494	0	754	738	73-69	.511
22	Tampa Bay Rays	.487	59	82	.418	.510	0	595	631	66-75	.471
23	Oakland Athletics	.487	60	81	.426	.507	0	548	678	56-85	.395
24	Philadelphia Phillies	.481	63	79	.444	.493	0	518	672	53-89	.373
25	Milwaukee Brewers	.480	63	79	.444	.492	0	592	657	64-78	.448
26	Cincinnati Reds	.480	59	82	.418	.500	0	620	748	57-84	.407
27	San Diego Padres	.476	59	83	.415	.497	0	606	685	62-80	.439
28	Arizona Diamondbacks	.473	58	83	.411	.494	0	644	801	55-86	.393
29	Minnesota Twins	.472	53	89	.373	.505	0	657	796	58-84	.405
30	Atlanta Braves	.468	55	87	.387	.494	0	548	696	54-88	.383

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.