The Washington Nationals had the worst winning percentage by a team in 2008, winning 36.6 percent of the time.

	TEAM	W%	SEASON	W	L	G	AB	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	AVG	OBP	SLG	OPS
1	Nationals	.366	2008	59	102	161	5,491	641	1,376	269	26	117	608	534	67	1,095	81	43	6,192	2,048	412	64	36	21	153	.251	.323	.373	.696
2	Mariners	.377	2008	61	101	162	5,643	671	1,498	285	20	124	631	417	38	890	90	32	6,176	2,195	429	36	42	44	137	.265	.318	.389	.707
3	Padres	.389	2008	63	99	162	5,568	637	1,390	264	27	154	615	518	53	1,259	36	17	6,244	2,170	445	59	46	35	129	.250	.317	.390	.707
4	Pirates	.414	2008	67	95	162	5,628	735	1,454	314	21	153	705	474	59	1,039	57	19	6,278	2,269	488	66	51	40	111	.258	.320	.403	.723
5	Orioles	.422	2008	68	93	161	5,559	782	1,486	322	30	172	750	533	42	990	81	37	6,209	2,384	524	27	48	37	111	.267	.333	.429	.762
6	Braves	.444	2008	72	90	162	5,604	753	1,514	316	33	130	721	618	42	1,023	58	27	6,367	2,286	479	69	34	56	143	.270	.345	.408	.753
7	Giants	.444	2008	72	90	162	5,543	640	1,452	311	37	94	606	452	48	1,044	108	46	6,144	2,119	442	57	44	45	139	.262	.321	.382	.703
8	Reds	.457	2008	74	88	162	5,465	704	1,351	269	24	187	677	560	50	1,125	85	47	6,188	2,229	480	72	41	50	101	.247	.321	.408	.729
9	Tigers	.457	2008	74	88	162	5,641	821	1,529	293	41	200	780	572	44	1,076	63	31	6,331	2,504	534	30	44	23	144	.271	.340	.444	.784
10	Rockies	.457	2008	74	88	162	5,557	747	1,462	310	28	160	714	570	57	1,209	141	37	6,312	2,308	498	90	38	36	119	.263	.336	.415	.751
11	Royals	.463	2008	75	87	162	5,608	691	1,507	303	28	120	650	392	50	1,005	79	38	6,118	2,226	451	32	36	31	144	.269	.320	.397	.717
12	Athletics	.466	2008	75	86	161	5,451	646	1,318	270	23	125	610	574	48	1,226	88	21	6,138	2,009	418	30	35	23	126	.242	.318	.369	.686
13	Rangers	.488	2008	79	83	162	5,728	901	1,619	376	35	194	867	595	63	1,207	81	25	6,477	2,647	605	37	54	43	117	.283	.354	.462	.816
14	Indians	.500	2008	81	81	162	5,543	805	1,455	339	22	171	772	560	103	1,213	77	29	6,298	2,351	532	43	49	44	123	.262	.339	.424	.763
15	Diamondbacks	.506	2008	82	80	162	5,409	720	1,355	318	47	159	683	587	49	1,287	58	23	6,156	2,244	524	68	43	49	105	.251	.327	.415	.742
16	Dodgers	.519	2008	84	78	162	5,506	700	1,455	271	29	137	659	543	43	1,032	126	43	6,194	2,195	437	64	38	62	153	.264	.333	.399	.732
17	Marlins	.522	2008	84	77	161	5,499	770	1,397	302	28	208	741	543	69	1,371	76	28	6,206	2,379	538	49	46	50	98	.254	.326	.433	.759
18	Cardinals	.531	2008	86	76	162	5,636	779	1,585	283	26	174	744	577	42	985	73	32	6,370	2,442	483	71	44	63	150	.281	.350	.433	.783
19	Blue Jays	.531	2008	86	76	162	5,503	714	1,453	303	32	126	681	521	59	938	80	27	6,187	2,198	461	48	56	34	150	.264	.331	.399	.731
20	Astros	.534	2008	86	75	161	5,451	712	1,432	284	22	167	684	449	52	1,051	114	52	6,050	2,261	473	57	41	42	116	.263	.323	.415	.737
21	Twins	.540	2008	88	75	163	5,641	829	1,572	298	49	111	791	529	36	979	102	42	6,330	2,301	458	52	72	48	142	.279	.340	.408	.748
22	White Sox	.546	2008	89	74	163	5,553	811	1,458	296	13	235	785	540	63	1,016	67	34	6,231	2,485	544	28	47	33	157	.263	.332	.448	.780
23	Yankees	.549	2008	89	73	162	5,572	789	1,512	289	20	180	758	535	80	1,015	118	39	6,257	2,381	489	31	39	36	149	.271	.342	.427	.769
24	Mets	.549	2008	89	73	162	5,606	799	1,491	274	38	172	751	619	39	1,024	138	36	6,386	2,357	484	73	49	71	129	.266	.340	.420	.761
25	Brewers	.556	2008	90	72	162	5,535	750	1,398	324	35	198	722	550	69	1,203	108	38	6,251	2,386	557	54	43	44	97	.253	.325	.431	.757