MLB Relative Power Index - 2008

Season: 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008

MLB RPI Rankings
RNK	TEAM	RPI	W	L	PCT	SOS	PWR	RS	RA	ExpW-L	ExpWP
1	Tampa Bay Rays	.556	53	32	.624	.533	1	408	340	50-35	.590
2	Boston Red Sox	.537	52	37	.584	.522	5	448	370	53-36	.594
3	Los Angeles Angels	.534	52	34	.605	.510	3	361	343	45-41	.526
4	Chicago White Sox	.531	49	37	.570	.518	2	414	332	52-34	.609
5	Minnesota Twins	.521	48	38	.558	.509	4	423	397	46-40	.532
6	Chicago Cubs	.520	52	35	.598	.494	8	464	367	54-33	.615
7	Oakland Athletics	.518	47	39	.547	.509	7	380	314	51-35	.594
8	Baltimore Orioles	.518	44	41	.518	.518	16	395	391	43-42	.505
9	Milwaukee Brewers	.512	47	39	.547	.500	11	393	388	44-42	.506
10	New York Yankees	.509	45	42	.517	.506	10	410	389	46-41	.526
11	Toronto Blue Jays	.506	41	46	.471	.517	13	356	335	46-41	.530
12	St. Louis Cardinals	.505	49	39	.557	.488	9	409	388	46-42	.526
13	Texas Rangers	.505	44	43	.506	.505	12	472	498	41-46	.473
14	Philadelphia Phillies	.505	48	39	.552	.489	6	442	357	53-34	.605
15	Detroit Tigers	.503	43	43	.500	.504	14	411	414	43-43	.496
16	Pittsburgh Pirates	.496	40	45	.471	.505	24	413	469	37-48	.437
17	Houston Astros	.493	40	47	.460	.504	23	375	418	39-48	.446
18	Kansas City Royals	.493	39	48	.448	.508	22	360	417	37-50	.427
19	Florida Marlins	.492	44	42	.512	.485	18	423	443	41-45	.477
20	Cincinnati Reds	.488	41	47	.466	.495	25	375	432	38-50	.430
21	Los Angeles Dodgers	.488	42	44	.488	.487	15	358	348	44-42	.514
22	Arizona Diamondbacks	.487	43	44	.494	.484	19	388	384	44-43	.505
23	New York Mets	.484	42	44	.488	.482	17	406	402	43-43	.505
24	Cleveland Indians	.484	37	49	.430	.502	27	378	380	43-43	.497
25	Atlanta Braves	.483	41	46	.471	.487	21	387	355	47-40	.543
26	Seattle Mariners	.477	34	52	.395	.504	26	350	409	36-50	.423
27	San Francisco Giants	.474	38	49	.437	.486	20	359	401	39-48	.445
28	Colorado Rockies	.467	36	51	.414	.484	29	385	455	36-51	.417
29	Washington Nationals	.466	34	54	.386	.493	28	319	438	31-57	.347
30	San Diego Padres	.456	34	53	.391	.477	30	323	411	33-54	.382

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.

Inside MLB

America is the land of opportunity, so it's only fitting that the Rays become the No. 1 team on the Fourth of July. Power Rankings

Are they for real? The Rays' big first half has us looking at other teams with losing histories who started out hot. Jonah Keri

The Rays began to win when they got rid of the "Devil." And they're not the first team to win after making a name change. Tom McKean

Mark McGwire left a lot unsaid when he left baseball. If he wants back in, he needs to speak up. Gene Wojciechowski

Upon the re-release of his book, Buster Olney looks at this year's Yankees as a team lacking the mystique of its dynasty years.

Brad Ziegler converted to a submarine-style pitcher nearly two years ago. And now as a rookie, he's baffling hitters with his sinker. Buster Olney