The Boston Red Caps had an ERA of 2.51 in the NL in 1876.

	TEAM	ERA	SEASON	G	W%	W	L	GS	SO	CG	SV	IP	H	ER	R	HR	BB	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	RA	H/9
1	Red Caps	2.51	1876	70	.557	39	31	70	77	49	7	632.0	732	176	450	7	104	2,834	46	1.10	1.48	0.74	0.10	2.7	3.7	1.32	6.41	10.42
2	White Stockings	1.76	1876	66	.788	52	14	66	51	58	4	592.1	608	116	257	6	29	2,489	3	0.77	0.44	1.76	0.09	2.0	1.2	1.08	3.90	9.24
3	Reds	3.62	1876	65	.138	9	56	65	60	57	0	591.0	850	238	579	9	34	2,749	28	0.91	0.52	1.76	0.14	2.2	1.2	1.50	8.82	12.94
4	Dark Blues	1.67	1876	69	.691	47	21	69	114	69	0	624.0	570	116	261	2	27	2,536	15	1.64	0.39	4.22	0.03	4.5	1.1	0.96	3.76	8.22
5	Grays	1.69	1876	69	.455	30	36	69	125	67	0	643.0	605	121	344	3	38	2,680	25	1.75	0.53	3.29	0.04	4.7	1.4	1.00	4.81	8.47
6	Mutuals	2.94	1876	57	.375	21	35	57	37	56	0	530.0	718	173	412	8	24	2,400	3	0.63	0.41	1.54	0.14	1.5	1.0	1.40	7.00	12.19
7	Athletics	3.22	1876	60	.237	14	45	60	22	53	2	550.0	783	197	534	2	41	2,565	33	0.36	0.67	0.54	0.03	0.9	1.6	1.50	8.74	12.81
8	Brown Stockings	1.22	1876	64	.703	45	19	64	103	63	0	577.0	472	78	229	3	39	2,283	34	1.61	0.61	2.64	0.05	4.5	1.7	0.89	3.57	7.36
9	Red Caps	2.15	1877	61	.700	42	18	61	177	61	0	548.0	557	131	263	5	38	2,278	20	2.91	0.62	4.66	0.08	7.8	1.7	1.09	4.32	9.15
10	White Stockings	3.37	1877	60	.441	26	33	60	92	45	3	534.0	630	200	375	7	58	2,360	45	1.55	0.98	1.59	0.12	3.9	2.5	1.29	6.32	10.62
11	Reds	4.19	1877	58	.263	15	42	58	85	48	1	515.0	747	240	485	4	61	2,412	47	1.49	1.07	1.39	0.07	3.5	2.5	1.57	8.48	13.05
12	Dark Blues	2.32	1877	60	.534	31	27	60	99	59	0	544.0	572	140	311	2	56	2,318	18	1.64	0.93	1.77	0.03	4.3	2.4	1.15	5.15	9.46
13	Grays	2.25	1877	61	.583	35	25	61	141	61	0	559.0	617	140	288	4	41	2,328	20	2.27	0.66	3.44	0.06	6.1	1.8	1.18	4.64	9.93
14	Brown Stockings	2.66	1877	60	.467	28	32	60	132	52	0	541.0	582	160	318	2	92	2,313	52	2.20	1.53	1.43	0.03	5.7	4.0	1.25	5.29	9.68
15	Red Caps	2.32	1878	60	.683	41	19	60	184	58	0	544.0	595	140	241	6	38	2,225	17	3.04	0.63	4.84	0.10	8.3	1.7	1.16	3.99	9.84
16	White Stockings	2.37	1878	61	.500	30	30	61	175	61	0	551.0	577	145	331	4	35	2,312	38	2.86	0.57	5.00	0.07	7.6	1.5	1.11	5.41	9.42
17	Reds	1.84	1878	61	.617	37	23	61	220	61	0	548.0	546	112	281	2	63	2,267	43	3.61	1.03	3.49	0.03	9.7	2.8	1.11	4.61	8.97
18	Blues	2.32	1878	63	.400	24	36	63	182	59	1	578.0	621	149	328	3	87	2,456	30	2.83	1.35	2.09	0.05	7.4	3.5	1.22	5.11	9.67
19	Grays	2.60	1878	61	.250	15	45	61	147	54	0	547.0	589	158	386	3	55	2,369	50	2.42	0.90	2.67	0.05	6.2	2.3	1.18	6.35	9.69
20	Grays	2.38	1878	62	.550	33	27	62	173	59	0	556.0	609	147	337	5	86	2,388	58	2.80	1.39	2.01	0.08	7.2	3.6	1.25	5.46	9.86
21	Red Caps	2.19	1879	84	.643	54	30	84	230	79	0	753.0	757	183	348	9	46	3,060	24	2.75	0.55	5.00	0.11	7.5	1.5	1.07	4.16	9.05
22	White Stockings	2.46	1879	83	.582	46	33	83	211	82	0	744.0	762	203	411	5	57	3,176	24	2.55	0.69	3.70	0.06	6.6	1.8	1.10	4.97	9.22
23	Reds	2.29	1879	81	.538	43	37	81	246	79	0	726.0	756	185	464	11	81	3,133	57	3.05	1.00	3.04	0.14	7.9	2.6	1.15	5.75	9.37
24	Grays	2.18	1879	85	.702	59	25	85	329	73	2	776.0	765	188	355	9	62	3,204	46	3.82	0.72	5.31	0.10	10.3	1.9	1.07	4.12	8.87
25	Bisons	2.34	1879	79	.590	46	32	79	198	78	0	713.0	698	185	365	3	47	2,932	25	2.50	0.59	4.21	0.04	6.8	1.6	1.04	4.61	8.81