2016 MLB Relative Power Index (RPI),as of the games of August 21,2016 from ESPN.GO.COM

MLB RPI Rankings

RK	TEAM	RPI	W	L	PCT	SOS	PWR	RS	RA	EXPW-L	EXPWP
1	Chicago Cubs	.529	78	45	.634	.494	0	631	423	85-38	.690
2	Texas Rangers	.524	73	52	.584	.504	0	582	581	63-62	.501
3	Toronto Blue Jays	.523	70	54	.565	.509	0	596	501	73-51	.586
4	Cleveland Indians	.521	71	51	.582	.501	0	616	511	72-50	.592
5	Washington Nationals	.519	73	50	.593	.494	0	600	455	78-45	.635
6	Boston Red Sox	.519	69	54	.561	.505	0	677	561	73-50	.593
7	Baltimore Orioles	.516	67	56	.545	.507	0	579	561	63-60	.516
8	Seattle Mariners	.511	66	57	.537	.502	0	579	528	67-56	.546
9	Detroit Tigers	.511	65	59	.524	.506	0	571	562	63-61	.508
10	Kansas City Royals	.509	64	60	.516	.506	0	495	518	59-65	.477
11	St. Louis Cardinals	.508	66	57	.537	.498	0	614	533	70-53	.570
12	San Francisco Giants	.506	68	56	.548	.491	0	556	507	68-56	.546
13	New York Yankees	.505	63	60	.512	.503	0	510	539	58-65	.472
14	Houston Astros	.505	64	60	.516	.501	0	569	523	67-57	.542
15	Los Angeles Dodgers	.505	68	55	.553	.489	0	549	490	68-55	.557
16	Pittsburgh Pirates	.502	62	59	.512	.498	0	549	547	61-60	.502
17	Chicago White Sox	.500	59	64	.480	.507	0	493	538	56-67	.456
18	Miami Marlins	.499	65	59	.524	.491	0	528	514	64-60	.513
19	New York Mets	.497	62	62	.500	.497	0	469	479	61-63	.489
20	Colorado Rockies	.493	60	64	.484	.496	0	660	642	64-60	.514
21	Philadelphia Phillies	.487	58	67	.464	.494	0	473	593	49-76	.389
22	Tampa Bay Rays	.486	52	70	.426	.506	0	516	530	59-63	.487
23	Los Angeles Angels	.485	52	72	.419	.507	0	550	593	57-67	.462
24	Oakland Athletics	.485	53	71	.427	.504	0	495	596	51-73	.408
25	Cincinnati Reds	.484	53	70	.431	.502	0	548	655	51-72	.412
26	San Diego Padres	.479	53	71	.427	.496	0	544	602	56-68	.450
27	Arizona Diamondbacks	.477	51	73	.411	.499	0	561	690	49-75	.398
28	Milwaukee Brewers	.477	53	70	.431	.492	0	504	590	52-71	.422
29	Minnesota Twins	.475	49	75	.395	.502	0	562	661	52-72	.420
30	Atlanta Braves	.465	45	79	.363	.499	0	451	604	44-80	.358

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.