The Hartford Dark Blues have walked the lowest walks per nine innings by a team in a season, with 0.39 BB/9 in 1876.

	TEAM	BB/9	SEASON	G	W%	W	L	GS	ERA	SO	CG	SV	IP	H	ER	R	HR	BB	HBP	TBF	WP	K/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	H/9
1	Dark Blues	0.39	1876	69	.691	47	21	69	1.67	114	69	0	624.0	570	116	261	2	27		2,536	15	1.64	4.22	0.03	4.5	1.1	0.96		3.76	8.22
2	Mutuals	0.41	1876	57	.375	21	35	57	2.94	37	56	0	530.0	718	173	412	8	24		2,400	3	0.63	1.54	0.14	1.5	1.0	1.40		7.00	12.19
3	White Stockings	0.44	1876	66	.788	52	14	66	1.76	51	58	4	592.1	608	116	257	6	29		2,489	3	0.77	1.76	0.09	2.0	1.2	1.08		3.90	9.24
4	Reds	0.52	1876	65	.138	9	56	65	3.62	60	57	0	591.0	850	238	579	9	34		2,749	28	0.91	1.76	0.14	2.2	1.2	1.50		8.82	12.94
5	Grays	0.53	1876	69	.455	30	36	69	1.69	125	67	0	643.0	605	121	344	3	38		2,680	25	1.75	3.29	0.04	4.7	1.4	1.00		4.81	8.47
6	Red Caps	0.55	1879	84	.643	54	30	84	2.19	230	79	0	753.0	757	183	348	9	46		3,060	24	2.75	5.00	0.11	7.5	1.5	1.07		4.16	9.05
7	White Stockings	0.57	1878	61	.500	30	30	61	2.37	175	61	0	551.0	577	145	331	4	35		2,312	38	2.86	5.00	0.07	7.6	1.5	1.11		5.41	9.42
8	Grays	0.57	1880	87	.619	52	32	87	1.64	286	75	3	799.0	663	146	299	7	51		3,137	26	3.22	5.61	0.08	9.1	1.6	0.89		3.37	7.47
9	Bisons	0.59	1879	79	.590	46	32	79	2.34	198	78	0	713.0	698	185	365	3	47		2,932	25	2.50	4.21	0.04	6.8	1.6	1.04		4.61	8.81
10	Brown Stockings	0.61	1876	64	.703	45	19	64	1.22	103	63	0	577.0	472	78	229	3	39		2,283	34	1.61	2.64	0.05	4.5	1.7	0.89		3.57	7.36
11	Trojans	0.61	1879	77	.253	19	56	77	2.80	210	75	0	695.0	840	216	543	13	47		3,106	67	2.72	4.47	0.17	6.8	1.5	1.28		7.03	10.88
12	Red Caps	0.62	1877	61	.700	42	18	61	2.15	177	61	0	548.0	557	131	263	5	38		2,278	20	2.91	4.66	0.08	7.8	1.7	1.09		4.32	9.15
13	Red Caps	0.63	1878	60	.683	41	19	60	2.32	184	58	0	544.0	595	140	241	6	38		2,225	17	3.04	4.84	0.10	8.3	1.7	1.16		3.99	9.84
14	Grays	0.66	1877	61	.583	35	25	61	2.25	141	61	0	559.0	617	140	288	4	41		2,328	20	2.27	3.44	0.06	6.1	1.8	1.18		4.64	9.93
15	Athletics	0.67	1876	60	.237	14	45	60	3.22	22	53	2	550.0	783	197	534	2	41		2,565	33	0.36	0.54	0.03	0.9	1.6	1.50		8.74	12.81
16	White Stockings	0.69	1879	83	.582	46	33	83	2.46	211	82	0	744.0	762	203	411	5	57		3,176	24	2.55	3.70	0.06	6.6	1.8	1.10		4.97	9.22
17	Grays	0.72	1879	85	.702	59	25	85	2.18	329	73	2	776.0	765	188	355	9	62		3,204	46	3.82	5.31	0.10	10.3	1.9	1.07		4.12	8.87
18	Stars	0.72	1879	71	.314	22	48	71	3.19	132	64	0	649.0	775	230	462	4	52		2,854	64	1.83	2.54	0.06	4.6	1.8	1.27		6.41	10.75
19	Colonels	0.88	1884	110	.630	68	40	110	2.17	470	101	0	989.2	837	239	425	9	97	30	3,996	45	4.27	4.85	0.08	11.8	2.4	0.94	.244	3.86	7.61
20	Outlaw Reds	0.89	1884	105	.657	69	36	105	2.38	503	95	1	914.1	831	242	466	17	90		3,766	32	4.95	5.59	0.17	13.4	2.4	1.01		4.59	8.18
21	Grays	0.90	1878	61	.250	15	45	61	2.60	147	54	0	547.0	589	158	386	3	55		2,369	50	2.42	2.67	0.05	6.2	2.3	1.18		6.35	9.69
22	Red Caps	0.93	1882	85	.536	45	39	85	2.80	352	81	0	749.0	738	233	414	10	77		3,164	44	4.23	4.57	0.12	11.1	2.4	1.09		4.97	8.87
23	Dark Blues	0.93	1877	60	.534	31	27	60	2.32	99	59	0	544.0	572	140	311	2	56		2,318	18	1.64	1.77	0.03	4.3	2.4	1.15		5.15	9.46
24	Beaneaters	0.94	1883	98	.643	63	35	98	2.55	538	89	3	860.0	853	244	456	11	90		3,575	54	5.63	5.98	0.12	15.0	2.5	1.10		4.77	8.93
25	Bisons	0.95	1880	85	.293	24	58	85	3.09	186	72	1	739.0	879	254	502	10	78		3,224	50	2.27	2.38	0.12	5.8	2.4	1.29		6.11	10.71