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Sunday, November 23

Relative Power Index

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2008 MLB RPI Rankings
RNK	TEAM	RPI	W	L	PCT	SOS	PWR	RS	RA	ExpW-L	ExpWP
1	Tampa Bay	.538	97	65	.599	.517	3	774	671	92-70	.571
2	Boston	.533	95	67	.586	.515	4	845	694	97-65	.597
3	LA Angels	.531	100	62	.617	.502	2	765	697	89-73	.546
4	Chicago Cubs	.525	97	64	.602	.499	1	855	671	100-61	.619
5	NY Yankees	.524	89	73	.549	.515	8	789	727	88-74	.541
6	Toronto	.520	86	76	.531	.516	10	714	610	94-68	.578
7	Chicago Sox	.518	89	74	.546	.509	12	811	729	90-73	.553
8	Minnesota	.512	88	75	.540	.503	9	829	745	90-73	.553
9	Milwaukee	.512	90	72	.556	.498	7	750	689	88-74	.542
10	Philadelphia	.512	92	70	.568	.493	5	799	680	94-68	.580
11	Houston	.510	86	75	.534	.502	13	712	743	77-84	.479
12	St. Louis	.506	86	76	.531	.497	14	779	725	87-75	.536
13	NY Mets	.505	89	73	.549	.490	6	799	715	90-72	.555
14	Cleveland	.501	81	81	.500	.502	16	805	761	86-76	.528
15	Texas	.501	79	83	.488	.505	18	901	967	75-87	.465
16	Florida	.500	84	77	.522	.493	15	770	767	81-80	.502
17	Oakland	.496	75	86	.466	.506	19	646	690	75-86	.467
18	LA Dodgers	.495	84	78	.519	.487	11	700	648	87-75	.539
19	Kansas City	.494	75	87	.463	.505	22	691	781	71-91	.439
20	Baltimore	.492	68	93	.422	.515	26	782	869	72-89	.447
21	Detroit	.491	74	88	.457	.502	23	821	857	78-84	.479
22	Cincinnati	.491	74	88	.457	.502	21	704	800	71-91	.436
23	Arizona	.490	82	80	.506	.485	17	720	706	83-79	.510
24	Pittsburgh	.481	67	95	.414	.503	28	735	884	66-96	.409
25	Atlanta	.480	72	90	.444	.492	24	753	778	78-84	.484
26	Colorado	.477	74	88	.457	.483	20	747	822	73-89	.452
27	San Francisco	.475	72	90	.444	.485	25	640	759	67-95	.416
28	Seattle	.471	61	101	.377	.503	30	671	811	66-96	.406
29	Washington	.462	59	102	.366	.494	29	641	825	61-100	.376
30	San Diego	.461	63	99	.389	.485	27	637	764	66-96	.410

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.