2014 MLB Relative Power Index (RPI), as of the games of May 15,2014

MLB RPI Rankings
RK	TEAM	RPI	W	L	PCT	SOS	PWR	RS	RA	EXPW-L	EXPWP
1	Detroit Tigers	.549	24	12	.667	.509	1	176	131	23-13	.643
2	San Francisco Giants	.547	27	15	.643	.516	2	179	148	25-17	.594
3	Atlanta Braves	.525	22	17	.564	.512	7	126	120	20-19	.524
4	Milwaukee Brewers	.522	26	15	.634	.484	4	163	149	22-19	.545
5	Oakland Athletics	.519	25	16	.610	.489	3	205	134	29-12	.701
6	Los Angeles Dodgers	.519	22	20	.524	.517	8	175	172	21-21	.509
7	San Diego Padres	.515	20	22	.476	.529	27	124	146	18-24	.419
8	Los Angeles Angels	.512	22	18	.550	.500	12	202	169	24-16	.588
9	Baltimore Orioles	.512	21	18	.538	.503	6	157	166	18-21	.472
10	Colorado Rockies	.511	23	19	.548	.499	5	233	183	26-16	.618
11	Miami Marlins	.510	21	21	.500	.514	11	191	175	23-19	.544
12	Minnesota Twins	.509	19	20	.487	.517	26	184	195	18-21	.471
13	Washington Nationals	.508	21	19	.525	.502	9	159	159	20-20	.500
14	Boston Red Sox	.507	20	20	.500	.510	13	172	174	20-20	.494
15	Seattle Mariners	.504	20	20	.500	.505	16	165	160	21-19	.515
16	New York Yankees	.502	21	19	.525	.494	10	174	187	19-21	.464
17	Kansas City Royals	.499	20	20	.500	.499	20	157	153	21-19	.513
18	Cleveland Indians	.498	19	22	.463	.510	21	174	179	20-21	.486
19	New York Mets	.495	19	21	.475	.501	23	163	169	19-21	.482
20	Texas Rangers	.491	20	21	.488	.493	15	167	200	17-24	.411
21	Chicago White Sox	.491	20	22	.476	.496	18	205	214	20-22	.479
22	Toronto Blue Jays	.491	21	21	.500	.488	17	207	200	22-20	.517
23	Philadelphia Phillies	.484	17	21	.447	.496	25	144	178	15-23	.396
24	Tampa Bay Rays	.478	18	24	.429	.495	24	174	189	19-23	.459
25	St. Louis Cardinals	.478	21	20	.512	.466	14	154	148	21-20	.520
26	Cincinnati Reds	.477	18	21	.462	.482	19	143	134	21-18	.532
27	Pittsburgh Pirates	.475	17	23	.425	.492	22	158	171	18-22	.461
28	Houston Astros	.475	14	27	.341	.519	30	145	200	14-27	.345
29	Arizona Diamondbacks	.470	16	27	.372	.502	28	160	226	14-29	.334
30	Chicago Cubs	.435	13	26	.333	.469	29	156	163	19-20	.478

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.