2014 MLB Relative Power Index (RPI),as of the games of August 21,2014 from ESPN.GO.COM

MLB RPI Rankings
RK	TEAM	RPI	W	L	PCT	SOS	PWR	RS	RA	EXPW-L	EXPWP
1	Los Angeles Angels	.528	76	50	.603	.503	1	592	495	74-52	.589
2	Baltimore Orioles	.527	73	52	.584	.508	5	540	475	70-55	.564
3	Oakland Athletics	.524	74	52	.587	.503	2	608	446	82-44	.650
4	Kansas City Royals	.518	70	56	.556	.506	6	522	491	67-59	.531
5	Washington Nationals	.515	73	53	.579	.494	3	531	429	76-50	.605
6	St. Louis Cardinals	.514	69	57	.548	.503	10	479	481	63-63	.498
7	Detroit Tigers	.513	68	57	.544	.503	8	570	529	67-58	.537
8	Seattle Mariners	.513	68	58	.540	.504	9	499	401	77-49	.608
9	Milwaukee Brewers	.510	71	56	.559	.493	7	550	505	69-58	.543
10	Los Angeles Dodgers	.509	72	57	.558	.493	4	524	474	71-58	.550
11	Toronto Blue Jays	.508	65	62	.512	.507	13	568	560	64-63	.507
12	Cleveland Indians	.504	64	62	.508	.503	18	547	530	65-61	.516
13	New York Yankees	.504	64	61	.512	.502	15	490	530	58-67	.461
14	Atlanta Braves	.504	67	61	.523	.498	14	491	469	67-61	.523
15	Tampa Bay Rays	.503	62	65	.488	.507	16	499	483	66-61	.516
16	Pittsburgh Pirates	.502	65	62	.512	.499	11	532	537	63-64	.495
17	San Francisco Giants	.500	67	59	.532	.490	12	493	457	68-58	.538
18	Miami Marlins	.494	63	63	.500	.492	19	507	533	60-66	.475
19	Cincinnati Reds	.493	61	67	.477	.498	17	488	483	65-63	.505
20	New York Mets	.492	60	68	.469	.500	21	485	493	63-65	.492
21	Chicago White Sox	.491	59	68	.465	.500	22	538	604	56-71	.442
22	Boston Red Sox	.490	56	71	.441	.506	23	483	549	55-72	.436
23	Minnesota Twins	.489	56	70	.444	.504	24	528	575	58-68	.457
24	San Diego Padres	.488	59	67	.468	.494	20	418	428	62-64	.488
25	Houston Astros	.487	54	74	.422	.509	28	513	601	54-74	.421
26	Philadelphia Phillies	.483	56	71	.441	.497	25	488	565	54-73	.427
27	Chicago Cubs	.479	55	72	.433	.494	26	480	535	57-70	.446
28	Texas Rangers	.476	49	77	.389	.505	29	502	637	48-78	.383
29	Arizona Diamondbacks	.474	53	75	.414	.494	27	497	598	52-76	.409
30	Colorado Rockies	.468	50	76	.397	.491	30	590	659	56-70	.445

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.