Since 1970, the Colorado Rockies have the worst winning percentage by a team, winning 45.6 percent of the time.

	TEAM	W%	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	Rockies	.456	2,364	2,818	5,182	177,878	25,508	47,957	9,465	1,332	5,846	24,263	16,245	1,613	38,783	3,120	1,396	199,137	77,624	16,643	2,019	1,382	1,209	3,949	.270	.334	.436	.770
2	Marlins	.460	2,382	2,792	5,174	175,900	21,801	44,799	8,529	1,005	4,718	20,673	15,890	1,875	39,137	3,350	1,322	196,701	69,492	14,252	1,727	1,309	1,211	3,869	.255	.321	.395	.716
3	Padres	.471	4,165	4,679	8,846	299,139	36,080	74,737	13,270	1,730	7,271	33,945	28,556	2,136	59,163	6,029	2,580	335,782	113,280	22,271	3,692	2,259	2,659	6,451	.250	.317	.379	.696
4	Royals	.478	4,221	4,610	8,832	302,136	38,738	79,412	14,944	2,270	7,033	36,591	25,790	2,469	51,983	7,032	2,852	335,382	119,995	24,247	2,331	2,656	1,839	6,728	.263	.323	.397	.720
5	Mariners	.478	3,689	4,022	7,713	263,091	34,284	67,562	12,591	1,265	7,903	32,573	24,931	2,415	50,759	5,137	2,192	294,503	106,392	21,759	1,963	2,103	1,690	5,754	.257	.324	.404	.729
6	Tigers	.482	4,258	4,576	8,835	301,911	39,853	78,252	13,991	2,002	9,101	37,815	28,608	2,339	57,939	4,423	2,350	337,449	123,550	25,094	2,105	2,486	1,817	6,774	.259	.326	.409	.735
7	Pirates	.483	4,260	4,566	8,832	300,910	37,568	77,179	14,616	2,089	7,330	35,517	26,962	2,706	58,178	5,783	2,648	336,495	117,963	24,035	3,436	2,481	2,746	6,330	.256	.321	.392	.713
8	Nationals	.484	4,279	4,555	8,838	298,946	37,125	75,886	14,693	1,777	7,591	34,908	28,028	2,623	57,189	6,580	2,757	335,713	116,906	24,061	3,831	2,285	2,840	6,445	.254	.321	.391	.712
9	Rangers	.486	4,292	4,539	8,836	302,528	41,005	79,086	14,475	1,582	9,159	38,801	28,642	2,490	57,237	5,525	2,559	338,596	124,202	25,216	2,398	2,538	1,926	6,730	.261	.328	.411	.738
10	White Sox	.487	4,297	4,529	8,835	300,693	39,536	78,139	13,862	1,667	8,759	37,484	27,420	2,621	54,967	5,394	2,600	335,880	121,612	24,288	2,613	2,533	1,836	6,870	.260	.325	.404	.729
11	Twins	.489	4,317	4,517	8,837	303,179	40,129	80,077	15,000	1,919	7,885	37,847	28,059	2,638	54,594	4,838	2,415	338,626	122,570	24,804	2,202	2,548	1,997	7,270	.264	.329	.404	.734
12	Diamondbacks	.489	2,167	2,267	4,434	151,251	20,296	38,521	7,894	1,095	4,759	19,348	14,724	1,482	33,571	2,585	930	170,060	62,882	13,748	1,354	1,249	1,105	3,158	.255	.324	.416	.740
13	Rays	.489	2,168	2,264	4,432	150,671	19,700	38,234	7,596	863	4,634	18,741	14,287	1,709	34,410	3,343	1,261	168,604	61,458	13,093	753	1,184	695	3,101	.254	.323	.408	.731
14	Cubs	.489	4,320	4,508	8,836	301,222	38,843	77,156	14,211	1,813	8,659	36,670	28,488	2,455	58,889	4,993	2,409	337,944	120,970	24,683	3,461	2,318	2,680	6,472	.256	.323	.402	.725
15	Brewers	.491	4,341	4,497	8,841	300,241	39,472	77,040	14,424	1,742	8,706	37,414	28,816	2,729	58,778	5,919	2,711	337,316	121,066	24,872	3,105	2,425	2,124	6,571	.257	.325	.403	.728
16	Angels	.498	4,408	4,435	8,844	300,954	39,230	77,682	13,720	1,511	8,353	37,006	28,098	2,588	55,023	5,595	2,760	336,904	119,483	23,584	2,823	2,441	2,097	6,941	.258	.324	.397	.721
17	Mets	.499	4,405	4,428	8,836	299,313	37,520	75,475	13,865	1,563	7,934	35,420	29,267	2,598	57,520	5,583	2,396	337,048	116,268	23,362	3,481	2,389	2,803	6,592	.252	.322	.388	.710
18	Guardians	.499	4,404	4,416	8,822	301,334	40,393	78,944	14,626	1,532	8,551	38,197	29,254	2,575	53,961	5,789	2,697	338,339	122,287	24,709	2,488	2,688	1,944	6,972	.262	.330	.406	.736
19	Blue Jays	.500	3,855	3,856	7,714	264,282	35,737	68,775	13,744	1,503	8,407	33,909	24,510	2,472	49,724	4,621	1,979	294,945	110,746	23,654	1,526	2,155	1,418	6,026	.260	.326	.419	.745
20	Orioles	.501	4,418	4,402	8,824	301,328	39,891	77,775	14,259	1,275	9,547	37,889	29,312	2,535	55,486	4,701	2,144	337,760	123,225	25,081	2,124	2,461	1,912	7,073	.258	.327	.409	.736
21	Phillies	.502	4,442	4,398	8,844	301,583	39,093	77,153	14,552	2,010	8,295	36,932	29,851	2,560	59,726	5,957	2,228	339,548	120,610	24,857	3,140	2,414	2,903	6,221	.256	.326	.400	.726
22	Reds	.508	4,487	4,352	8,845	300,168	39,430	76,787	14,542	1,667	8,795	37,178	30,047	2,607	60,629	6,968	2,662	338,688	121,048	25,004	3,468	2,398	2,747	6,303	.256	.326	.403	.730
23	Giants	.508	4,490	4,353	8,844	300,322	38,379	76,356	14,045	1,929	7,995	36,130	29,686	2,362	58,128	5,164	2,503	338,460	118,244	23,969	3,694	2,396	3,154	6,516	.254	.324	.394	.718
24	Athletics	.511	4,520	4,319	8,839	299,402	39,903	75,418	13,913	1,376	9,076	37,668	31,170	2,599	57,936	6,158	2,583	338,017	119,311	24,365	2,305	2,541	1,753	6,750	.252	.325	.398	.724
25	Astros	.514	4,541	4,301	8,844	300,747	38,708	77,358	14,521	1,861	7,854	36,527	28,638	2,639	56,585	6,676	2,812	337,882	119,163	24,236	3,406	2,452	2,688	6,532	.257	.325	.396	.721