The Buffalo Bisons have the highest 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	5.03	5,116	.458	2,343	2,773	5,116	33,820	118	34	1,157	45232.1	49,183	25,263	27,248	6,009	18,021	1,918	1,344	199,493	1,938	6.73	3.59	1.88	1.20	17.0	9.0	1.49	.309	5.42	9.79
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	4.30	5,107	.460	2,347	2,760	5,107	37,092	157	67	1,219	45447.0	44,983	21,732	23,714	5,007	18,286	1,908	1,590	196,793	1,651	7.35	3.62	2.03	0.99	18.8	9.3	1.39	.297	4.70	8.91
13	Diamondbacks	4.29	4,369	.488	2,134	2,235	4,369	33,175	138	55	1,055	39022.1	38,588	18,596	20,278	4,934	13,836	1,533	1,046	167,370	1,483	7.65	3.19	2.40	1.14	19.8	8.3	1.34	.295	4.68	8.90
14	Mariners	4.29	7,647	.477	3,650	3,995	7,647	50,345	587	152	1,834	68165.1	67,954	32,474	35,596	8,100	25,372	2,418	1,800	293,048	2,552	6.65	3.35	1.98	1.07	17.2	8.7	1.37	.289	4.70	8.97
15	Rangers	4.28	10,223	.476	4,866	5,351	10,223	61,794	1,192	286	2,221	91046.2	91,581	43,290	48,038	10,047	35,077	3,068	2,355	393,387	3,399	6.11	3.47	1.76	0.99	15.7	8.9	1.39	.288	4.75	9.05
16	Royals	4.25	8,930	.477	4,255	4,673	8,930	52,866	955	240	2,046	79479.1	80,763	37,556	41,186	8,426	29,189	2,541	1,890	342,241	3,097	5.99	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	7,648	.499	3,816	3,829	7,648	50,162	651	162	1,792	68246.0	67,741	31,978	34,976	7,944	25,294	2,454	1,628	292,973	2,436	6.62	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	4,367	.490	2,141	2,226	4,367	32,857	106	41	1,119	38883.1	37,464	18,194	19,848	4,895	14,096	1,680	759	166,169	1,580	7.61	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	8,938	.488	4,364	4,570	8,938	55,201	929	208	2,171	79750.2	79,527	36,657	40,495	8,978	29,498	2,565	2,283	342,796	2,791	6.23	3.33	1.87	1.01	16.1	8.6	1.37	.286	4.57	8.97
25	Orioles	4.05	19,409	.475	9,163	10,136	19,409	92,257	5,886	889	2,994	173048.0	175,038	77,956	89,257	14,650	65,198	4,589	2,448	742,095	4,592	4.80	3.39	1.42	0.76	12.4	8.8	1.39	.284	4.64	9.10