2014 MLB Relative Power Index (RPI),as of the games of May 21,2014

MLB RPI Rankings
RK	TEAM	RPI	W	L	PCT	SOS	PWR	RS	RA	EXPW-L	EXPWP
1	San Francisco Giants	.538	29	18	.617	.512	3	197	167	27-20	.582
2	Detroit Tigers	.538	27	15	.643	.504	1	205	156	27-15	.633
3	Oakland Athletics	.531	30	16	.652	.490	2	241	142	34-12	.742
4	Atlanta Braves	.524	25	20	.556	.513	6	150	143	24-21	.524
5	Minnesota Twins	.516	23	21	.523	.513	19	202	211	21-23	.478
6	Cleveland Indians	.513	22	25	.468	.529	27	202	225	21-26	.446
7	Los Angeles Angels	.512	26	20	.565	.495	10	227	183	28-18	.606
8	Colorado Rockies	.512	26	21	.553	.498	7	255	207	28-19	.603
9	Los Angeles Dodgers	.512	25	22	.532	.505	9	205	202	24-23	.507
10	Miami Marlins	.509	24	23	.511	.509	14	223	195	27-20	.567
11	Milwaukee Brewers	.509	28	19	.596	.481	4	178	174	24-23	.511
12	Washington Nationals	.507	24	22	.522	.503	12	185	179	24-22	.516
13	Seattle Mariners	.507	22	23	.489	.513	20	187	177	24-21	.527
14	San Diego Padres	.504	21	26	.447	.523	26	142	169	19-28	.414
15	Baltimore Orioles	.501	23	21	.523	.494	8	184	186	22-22	.495
16	Kansas City Royals	.500	23	23	.500	.501	16	181	178	23-23	.508
17	Toronto Blue Jays	.499	25	22	.532	.488	13	228	216	25-22	.527
18	Boston Red Sox	.495	20	25	.444	.512	15	183	200	21-24	.456
19	New York Yankees	.492	24	21	.533	.478	11	193	204	21-24	.472
20	Texas Rangers	.491	22	24	.478	.496	21	181	217	19-27	.410
21	St. Louis Cardinals	.491	25	21	.543	.473	5	176	159	25-21	.551
22	Chicago White Sox	.489	23	25	.479	.493	23	234	245	23-25	.477
23	New York Mets	.489	20	25	.444	.504	18	180	195	21-24	.460
24	Philadelphia Phillies	.489	20	23	.465	.497	25	175	204	18-25	.424
25	Houston Astros	.481	17	30	.362	.521	30	170	227	17-30	.359
26	Cincinnati Reds	.479	21	24	.467	.483	17	160	167	22-23	.479
27	Pittsburgh Pirates	.478	19	26	.422	.496	24	178	202	20-25	.437
28	Tampa Bay Rays	.477	19	28	.404	.501	22	181	207	20-27	.433
29	Arizona Diamondbacks	.469	18	30	.375	.500	28	185	251	17-31	.352
30	Chicago Cubs	.454	16	28	.364	.484	29	174	174	22-22	.500

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.