2017 MLB Relative Power Index (RPI),as of the games of April 11,2017 from ESPN.GO.COM

MLB RPI Rankings

RK	TEAM	RPI	W	L	PCT	SOS	PWR	RS	RA	EXPW-L	EXPWP
1	Detroit Tigers	.723	5	2	.714	.726	0	27	29	3-4	.464
2	Arizona Diamondbacks	.648	7	2	.778	.605	0	53	36	6-3	.684
3	Boston Red Sox	.629	4	3	.571	.648	0	30	21	5-2	.671
4	San Francisco Giants	.597	3	6	.333	.684	0	41	44	4-5	.465
5	Chicago White Sox	.589	2	4	.333	.674	0	23	19	4-2	.594
6	Minnesota Twins	.570	5	2	.714	.522	0	31	15	6-1	.810
7	Colorado Rockies	.566	6	3	.667	.533	0	34	37	4-5	.458
8	Cleveland Indians	.557	4	3	.571	.552	0	30	36	3-4	.410
9	Philadelphia Phillies	.552	3	5	.375	.611	0	42	43	4-4	.488
10	Los Angeles Dodgers	.548	4	4	.500	.565	0	42	25	6-2	.738
11	Miami Marlins	.547	4	3	.571	.539	0	35	25	5-2	.662
12	Washington Nationals	.547	5	3	.625	.521	0	48	46	4-4	.521
13	Cincinnati Reds	.535	6	2	.750	.463	0	39	21	6-2	.775
14	New York Yankees	.531	3	4	.429	.565	0	33	26	4-3	.617
15	Baltimore Orioles	.523	4	2	.667	.475	0	21	27	2-4	.377
16	Los Angeles Angels	.518	6	2	.750	.440	0	41	34	5-3	.593
17	Chicago Cubs	.511	5	2	.714	.443	0	33	23	5-2	.673
18	St. Louis Cardinals	.510	2	6	.250	.597	0	28	47	2-6	.262
19	Oakland Athletics	.509	4	4	.500	.512	0	29	34	3-5	.421
20	Milwaukee Brewers	.506	3	5	.375	.550	0	33	38	3-5	.430
21	San Diego Padres	.466	4	5	.444	.473	0	29	45	3-6	.293
22	New York Mets	.447	5	3	.625	.388	0	39	29	5-3	.644
23	Texas Rangers	.437	2	5	.286	.488	0	38	39	3-4	.487
24	Pittsburgh Pirates	.423	3	4	.429	.421	0	23	34	2-5	.314
25	Kansas City Royals	.420	2	5	.286	.465	0	21	32	2-5	.301
26	Tampa Bay Rays	.388	5	3	.625	.308	0	34	34	4-4	.500
27	Toronto Blue Jays	.344	1	6	.143	.411	0	23	32	2-5	.341
28	Seattle Mariners	.301	2	7	.222	.328	0	33	39	4-5	.417
29	Atlanta Braves	.300	1	6	.143	.352	0	22	38	2-5	.251
30	Houston Astros	.256	5	4	.556	.156	0	28	35	4-5	.390

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.