Since 1900, the Brooklyn Robins have their lowest ERA in a season in 1916, with an ERA of 2.12.

	TEAM	ERA	SEASON	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	Robins	2.12	1916	156	.610	94	60	156	634	96	22	9	1427.1	1,201	336	470	24	372	38		5,725	34	4.00	2.35	1.70	0.15	11.1	6.5	1.10	.253	2.96	7.57
2	Superbas	2.38	1907	153	.439	65	83	153	479	125	20	1	1356.1	1,218	359	522	16	463	39		5,397	24	3.18	3.07	1.03	0.11	8.9	8.6	1.24	.273	3.46	8.08
3	Superbas	2.47	1908	154	.344	53	101	154	535	118	20	4	1369.0	1,165	375	515	17	444	60		5,454	24	3.52	2.92	1.20	0.11	9.8	8.1	1.18	.261	3.39	7.66
4	Robins	2.62	1920	155	.604	93	61	155	553	89	17	9	1427.1	1,381	416	530	25	327	22		5,848	29	3.49	2.06	1.69	0.16	9.5	5.6	1.20	.276	3.34	8.71
5	Dodgers	2.62	1966	162	.586	95	67	162	1,084	52	13	34	1458.0	1,287	425	490	84	356	27	67	5,941	42	6.69	2.20	3.04	0.52	18.2	6.0	1.13	.274	3.02	7.94
6	Robins	2.66	1915	154	.526	80	72	154	499	87	16	8	1389.2	1,252	410	560	29	473	67		5,814	31	3.23	3.06	1.05	0.19	8.6	8.1	1.24	.258	3.63	8.11
7	Dodgers	2.69	1968	162	.469	76	86	162	994	38	20	32	1449.1	1,293	433	509	65	414	37	79	5,951	43	6.17	2.57	2.40	0.40	16.7	7.0	1.18	.277	3.16	8.03
8	Superbas	2.69	1902	141	.543	75	63	141	536	131	14	3	1256.0	1,113	376	519	10	363	38		5,084	27	3.84	2.60	1.48	0.07	10.5	7.1	1.18	.267	3.72	7.98
9	Superbas	2.70	1904	154	.366	56	97	154	453	135	12	2	1337.1	1,281	401	614	27	414	59		5,494	28	3.05	2.79	1.09	0.18	8.2	7.5	1.27	.276	4.13	8.62
10	Robins	2.73	1919	141	.493	69	71	141	476	98	12	1	1281.0	1,256	389	513	21	292	35		5,271	22	3.34	2.05	1.63	0.15	9.0	5.5	1.21	.278	3.60	8.82
11	Robins	2.78	1917	156	.464	70	81	156	582	99	7	9	1421.1	1,288	439	566	32	405	43		5,843	26	3.69	2.56	1.44	0.20	10.0	6.9	1.19	.263	3.58	8.16
12	Dodgers	2.78	1972	155	.548	85	70	155	856	50	21	29	1403.0	1,196	434	527	83	429	34	36	5,795	43	5.49	2.75	2.00	0.53	14.8	7.4	1.16	.253	3.38	7.67
13	Dodgers	2.80	2022	162	.685	111	51	162	1,465	1	1	43	1451.1	1,114	451	513	152	407	75	13	5,865	38	9.08	2.52	3.60	0.94	25.0	6.9	1.05	.255	3.18	6.91
14	Robins	2.81	1918	126	.452	57	69	126	395	85	17	2	1131.1	1,024	353	459	22	320	28		4,611	34	3.14	2.55	1.23	0.18	8.6	6.9	1.19	.261	3.65	8.15
15	Dodgers	2.81	1965	162	.599	97	65	162	1,079	58	17	35	1476.0	1,223	461	521	127	425	33	53	6,018	51	6.58	2.59	2.54	0.77	17.9	7.1	1.12	.252	3.18	7.46
16	Robins	2.82	1914	154	.487	75	79	154	605	80	11	11	1368.1	1,282	428	618	36	466	40		5,685	23	3.98	3.07	1.30	0.24	10.6	8.2	1.28	.275	4.06	8.43
17	Dodgers	2.84	1942	155	.675	104	50	155	612	67	15	24	1398.2	1,205	442	512	73	493	33		5,814	14	3.94	3.17	1.24	0.47	10.5	8.5	1.21	.246	3.29	7.75
18	Dodgers	2.85	1963	163	.611	99	63	163	1,095	51	20	29	1469.2	1,329	466	550	111	402	33	74	6,083	45	6.71	2.46	2.72	0.68	18.0	6.6	1.18	.274	3.37	8.14
19	Dodgers	2.92	1975	162	.543	88	74	162	894	51	17	21	1469.2	1,215	477	534	104	448	28	20	6,015	34	5.47	2.74	2.00	0.64	14.9	7.4	1.13	.245	3.27	7.44
20	Dodgers	2.95	1989	160	.481	77	83	160	1,052	25	14	36	1463.1	1,278	479	536	95	504	27	73	6,034	53	6.47	3.10	2.09	0.58	17.4	8.4	1.22	.272	3.30	7.86
21	Dodgers	2.95	1964	164	.494	80	82	164	1,062	47	18	27	1483.2	1,289	487	572	88	458	27	79	6,150	51	6.44	2.78	2.32	0.53	17.3	7.4	1.18	.266	3.47	7.82
22	Dodgers	2.96	1985	162	.586	95	67	162	979	37	16	36	1465.0	1,280	482	579	102	462	21	56	6,043	42	6.01	2.84	2.12	0.63	16.2	7.6	1.19	.263	3.56	7.86
23	Dodgers	2.96	1988	162	.584	94	67	162	1,029	32	15	49	1463.1	1,291	482	544	84	473	22	61	6,050	43	6.33	2.91	2.18	0.52	17.0	7.8	1.21	.272	3.35	7.94
24	Dodgers	2.97	1974	162	.630	102	60	162	943	33	13	23	1465.1	1,272	484	561	112	464	24	9	6,056	36	5.79	2.85	2.03	0.69	15.6	7.7	1.18	.257	3.45	7.81
25	Dodgers	3.00	1973	162	.590	95	66	162	961	45	13	38	1491.0	1,270	497	565	129	461	29	38	6,100	47	5.80	2.78	2.08	0.78	15.8	7.6	1.16	.252	3.41	7.67