The Buffalo Bisons have the worst ERA by a team, with an ERA of 6.11.

	TEAM	ERA	G	W%	W	L	GS	SO	CG	SHO	SV	IP	H	ER	R	HR	BB	HBP	IBB	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	H/9
1	Bisons	6.11	134	.273	36	96	134	351	125		0	1141.0	1,499	775	1,199	67	673	48		5,658	78	2.77	5.31	0.52	0.53	6.2	11.9	1.90	.317	9.46	11.82
2	Rockies	5.02	5,107	.458	2,341	2,766	5,107	33,757	118	34	1,155	45156.1	49,083	25,211	27,192	5,994	17,989	1,913	1,341	199,137	1,936	6.73	3.59	1.88	1.19	17.0	9.0	1.49	.309	5.42	9.78
3	Stars	4.98	128	.433	55	72	128	454	115		0	1089.2	1,158	603	831	28	518	65		4,967	57	3.75	4.28	0.88	0.23	9.1	10.4	1.54	.290	6.86	9.56
4	Cowboys	4.85	126	.248	30	91	126	442	117		0	1066.2	1,345	575	872	27	246			4,805	95	3.73	2.08	1.80	0.23	9.2	5.1	1.49		7.36	11.35
5	Senators	4.72	1,265	.366	454	788	1,265	3,047	1,031		24	10745.2	13,330	5,635	8,777	367	4,319	651		49,546	411	2.55	3.62	0.71	0.31	6.1	8.7	1.64	.315	7.35	11.16
6	Gladiators	4.71	100	.263	26	73	100	230	96		0	879.0	1,011	460	733	21	421	57		4,093	69	2.35	4.31	0.55	0.22	5.6	10.3	1.63	.294	7.51	10.35
7	Mountain City	4.67	25	.240	6	19	25	93	20		0	219.2	292	114	216	3	52			1,027	14	3.81	2.13	1.79	0.12	9.1	5.1	1.57		8.85	11.96
8	Keystones	4.63	67	.313	21	46	67	310	64		0	593.1	726	305	545	7	105			2,677	80	4.70	1.59	2.95	0.11	11.6	3.9	1.40		8.27	11.01
9	Hoosiers	4.62	398	.370	146	249	398	1,041	359		3	3450.0	3,914	1,770	2,590	197	1,159	130		15,442	228	2.72	3.02	0.90	0.51	6.7	7.5	1.47	.288	6.76	10.21
10	Virginians	4.52	46	.286	12	30	46	167	45		0	370.1	402	186	294	14	52	17		1,634	19	4.06	1.26	3.21	0.34	10.2	3.2	1.23	.280	7.14	9.77
11	Cowboys	4.32	271	.364	98	171	271	828	256		2	2362.0	2,679	1,135	1,927	83	858	126		10,688	199	3.15	3.27	0.97	0.32	7.7	8.0	1.50	.295	7.34	10.21
12	Marlins	4.31	5,097	.459	2,342	2,755	5,097	37,007	157	67	1,217	45360.0	44,906	21,702	23,681	5,001	18,268	1,903	1,590	196,439	1,648	7.34	3.62	2.03	0.99	18.8	9.3	1.39	.297	4.70	8.91
13	Diamondbacks	4.29	4,359	.489	2,130	2,229	4,359	33,105	138	55	1,054	38936.0	38,503	18,558	20,237	4,921	13,807	1,527	1,044	167,001	1,482	7.65	3.19	2.40	1.14	19.8	8.3	1.34	.296	4.68	8.90
14	Mariners	4.29	7,638	.477	3,644	3,992	7,638	50,257	587	152	1,832	68085.2	67,887	32,440	35,557	8,091	25,347	2,415	1,798	292,719	2,550	6.64	3.35	1.98	1.07	17.2	8.7	1.37	.289	4.70	8.97
15	Rangers	4.28	10,213	.476	4,861	5,346	10,213	61,708	1,192	286	2,220	90957.1	91,492	43,253	47,996	10,033	35,046	3,067	2,351	393,007	3,397	6.11	3.47	1.76	0.99	15.7	8.9	1.39	.288	4.75	9.05
16	Royals	4.25	8,921	.476	4,249	4,670	8,921	52,786	955	240	2,045	79399.1	80,703	37,524	41,154	8,418	29,158	2,537	1,888	341,912	3,096	5.98	3.31	1.81	0.95	15.4	8.5	1.38	.290	4.66	9.15
17	Infants	4.23	131	.423	55	75	131	325	115		0	1143.2	1,386	537	1,027	45	571	55		5,460	86	2.56	4.49	0.57	0.35	6.0	10.5	1.71	.300	8.08	10.91
18	Blue Jays	4.22	7,639	.499	3,810	3,826	7,639	50,081	650	162	1,791	68168.0	67,675	31,951	34,945	7,934	25,265	2,447	1,624	292,641	2,435	6.61	3.34	1.98	1.05	17.1	8.6	1.36	.289	4.61	8.93
19	Burghers	4.22	128	.469	60	68	128	318	121		0	1116.2	1,267	523	892	32	334	40		5,144	52	2.56	2.69	0.95	0.26	6.2	6.5	1.43	.279	7.19	10.21
20	Rays	4.21	4,357	.491	2,139	2,218	4,357	32,781	106	41	1,118	38800.0	37,392	18,155	19,807	4,883	14,059	1,674	759	165,814	1,579	7.60	3.26	2.33	1.13	19.8	8.5	1.33	.289	4.59	8.67
21	Hoosiers	4.20	110	.271	29	78	110	479	107		0	937.2	1,000	438	755	30	199	28		4,160	75	4.60	1.91	2.41	0.29	11.5	4.8	1.28	.283	7.25	9.60
22	Giants	4.17	132	.565	74	57	132	449	111		6	1172.1	1,216	543	875	37	569	53		5,372	77	3.45	4.37	0.79	0.28	8.4	10.6	1.52	.277	6.72	9.34
23	Nationals	4.16	514	.326	163	337	514	1,690	485		0	4413.2	4,781	2,042	3,240	168	1,503	129		19,523	280	3.45	3.06	1.12	0.34	8.7	7.7	1.42	.288	6.61	9.75
24	Brewers	4.14	8,929	.488	4,356	4,569	8,929	55,108	929	208	2,168	79669.2	79,471	36,635	40,472	8,969	29,476	2,564	2,283	342,476	2,790	6.23	3.33	1.87	1.01	16.1	8.6	1.37	.286	4.57	8.98
25	Orioles	4.05	19,400	.475	9,157	10,133	19,400	92,178	5,886	889	2,990	172965.0	174,962	77,918	89,218	14,637	65,175	4,585	2,444	741,748	4,590	4.80	3.39	1.41	0.76	12.4	8.8	1.39	.284	4.64	9.10