2016 MLB Relative Power Index (RPI),as of the games of September 25,2016 from ESPN.GO.COM

MLB RPI Rankings

RK	TEAM	RPI	W	L	PCT	SOS	PWR	RS	RA	EXPW-L	EXPWP
1	Chicago Cubs	.530	99	56	.639	.494	0	767	527	105-50	.679
2	Texas Rangers	.526	92	64	.590	.505	0	740	729	79-77	.507
3	Boston Red Sox	.526	92	64	.590	.504	0	861	669	97-59	.624
4	Cleveland Indians	.518	90	65	.581	.498	0	751	647	89-66	.574
5	Washington Nationals	.518	91	64	.587	.495	0	734	575	96-59	.620
6	Baltimore Orioles	.517	85	71	.545	.508	0	720	698	80-76	.516
7	Toronto Blue Jays	.517	86	69	.555	.505	0	738	642	88-67	.569
8	Los Angeles Dodgers	.511	90	66	.577	.489	0	706	602	90-66	.579
9	Seattle Mariners	.510	82	73	.529	.504	0	730	677	83-72	.538
10	Houston Astros	.510	82	74	.526	.505	0	704	666	82-74	.528
11	Detroit Tigers	.508	83	72	.535	.499	0	719	703	79-76	.511
12	New York Yankees	.507	79	76	.510	.506	0	647	673	74-81	.480
13	Kansas City Royals	.505	79	77	.506	.505	0	653	684	74-82	.477
14	St. Louis Cardinals	.505	81	74	.523	.499	0	739	680	84-71	.542
15	New York Mets	.503	83	73	.532	.493	0	639	598	83-73	.533
16	San Francisco Giants	.500	82	74	.526	.491	0	677	620	85-71	.544
17	Chicago White Sox	.498	74	81	.477	.505	0	652	688	73-82	.473
18	Pittsburgh Pirates	.495	77	78	.497	.495	0	707	714	77-78	.495
19	Los Angeles Angels	.494	69	87	.442	.511	0	684	714	75-81	.479
20	Miami Marlins	.492	77	78	.497	.491	0	630	646	76-79	.487
21	Oakland Athletics	.489	67	88	.432	.508	0	630	725	67-88	.430
22	Tampa Bay Rays	.488	65	90	.419	.511	0	649	681	74-81	.476
23	Colorado Rockies	.487	73	83	.468	.493	0	827	830	78-78	.498
24	Philadelphia Phillies	.484	70	86	.449	.495	0	591	760	59-97	.377
25	Milwaukee Brewers	.483	70	86	.449	.494	0	643	705	71-85	.454
26	Cincinnati Reds	.481	65	90	.419	.501	0	677	817	63-92	.407
27	San Diego Padres	.478	66	90	.423	.496	0	659	738	69-87	.444
28	Atlanta Braves	.475	63	92	.406	.498	0	617	760	62-93	.397
29	Arizona Diamondbacks	.475	64	91	.413	.495	0	713	867	63-92	.403
30	Minnesota Twins	.468	56	100	.359	.504	0	695	864	61-95	.393

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.