2016 MLB Relative Power Index (RPI),as of the games of September 30,2016 from ESPN.GO.COM

MLB RPI Rankings

RK	TEAM	RPI	W	L	PCT	SOS	PWR	RS	RA	EXPW-L	EXPWP
1	Chicago Cubs	.531	102	57	.642	.494	0	797	545	108-51	.681
2	Texas Rangers	.526	95	65	.594	.504	0	760	747	81-79	.509
3	Boston Red Sox	.524	93	67	.581	.505	0	874	688	99-61	.617
4	Cleveland Indians	.519	92	67	.579	.500	0	768	671	90-69	.567
5	Baltimore Orioles	.519	88	72	.550	.508	0	736	706	83-77	.521
6	Washington Nationals	.516	93	67	.581	.494	0	751	604	97-63	.607
7	Toronto Blue Jays	.515	87	73	.544	.506	0	753	662	90-70	.564
8	Seattle Mariners	.513	86	74	.538	.504	0	758	695	87-73	.543
9	New York Yankees	.510	83	77	.519	.507	0	671	694	77-83	.483
10	Detroit Tigers	.510	86	73	.541	.499	0	747	715	83-76	.522
11	Houston Astros	.509	83	77	.519	.506	0	720	693	83-77	.519
12	Los Angeles Dodgers	.509	91	69	.569	.489	0	724	628	91-69	.571
13	Kansas City Royals	.505	81	79	.506	.504	0	670	703	76-84	.476
14	St. Louis Cardinals	.504	84	76	.525	.497	0	765	705	87-73	.541
15	New York Mets	.504	86	74	.538	.493	0	664	609	87-73	.543
16	San Francisco Giants	.501	85	75	.531	.491	0	705	630	89-71	.556
17	Chicago White Sox	.499	78	82	.488	.503	0	683	703	78-82	.486
18	Los Angeles Angels	.496	73	87	.456	.510	0	709	723	78-82	.490
19	Pittsburgh Pirates	.496	78	81	.491	.497	0	722	744	77-82	.485
20	Miami Marlins	.493	79	80	.497	.491	0	647	670	77-82	.483
21	Colorado Rockies	.488	75	85	.469	.494	0	838	850	79-81	.493
22	Tampa Bay Rays	.486	66	94	.413	.511	0	662	708	75-85	.466
23	Oakland Athletics	.485	67	93	.419	.508	0	641	751	67-93	.421
24	Milwaukee Brewers	.482	71	89	.444	.495	0	661	726	73-87	.453
25	Cincinnati Reds	.481	67	93	.419	.501	0	705	843	66-94	.412
26	Philadelphia Phillies	.480	70	90	.438	.494	0	602	789	59-101	.368
27	San Diego Padres	.479	68	92	.425	.497	0	679	758	71-89	.445
28	Arizona Diamondbacks	.477	67	93	.419	.496	0	740	883	66-94	.413
29	Atlanta Braves	.477	66	93	.415	.497	0	643	776	65-94	.407
30	Minnesota Twins	.467	57	103	.356	.504	0	710	886	63-97	.391

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.