mlb team with the least runs allowed per game in a season 1961 to 2019

Between the 1961 and 2019 seasons, the Houston Astros gave up the fewest runs by a team in a season, with 331 runs in 1981.

	TEAM	R	G	SEASON	W%	W	L	GS	ERA	SO	CG	SHO	SV	IP	H	ER	HR	BB	HBP	IBB	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	H/9
1	Astros	331	110	1981	.555	61	49	110	2.66	610	23	13	25	990.0	842	293	40	300	11	24	4,034	36	5.55	2.73	2.03	0.36	15.1	7.4	1.15	.261	3.01	7.65
2	Yankees	343	107	1981	.551	59	48	107	2.90	606	16	0	30	948.0	827	305	64	287	10	17	3,872	25	5.75	2.72	2.11	0.61	15.7	7.4	1.18	.263	3.26	7.85
3	Dodgers	356	110	1981	.573	63	47	110	3.01	603	26	15	24	997.0	904	333	54	302	14	38	4,099	19	5.44	2.73	2.00	0.49	14.7	7.4	1.21	.272	3.21	8.16
4	Rangers	389	105	1981	.543	57	48	105	3.40	488	23	10	18	940.1	851	355	67	322	17	34	3,909	18	4.67	3.08	1.52	0.64	12.5	8.2	1.25	.260	3.72	8.14
5	Expos	394	108	1981	.556	60	48	108	3.30	520	20	8	23	975.0	902	357	58	268	18	21	4,008	28	4.80	2.47	1.94	0.54	13.0	6.7	1.20	.268	3.64	8.33
6	Athletics	403	109	1981	.587	64	45	109	3.30	505	60	11	10	993.0	883	364	80	370	28	17	4,166	30	4.58	3.35	1.36	0.73	12.1	8.9	1.26	.252	3.65	8.00
7	Tigers	404	109	1981	.550	60	49	109	3.53	476	33	6	22	969.1	840	380	83	373	27	41	4,030	24	4.42	3.46	1.28	0.77	11.8	9.3	1.25	.246	3.75	7.80
8	Royals	405	103	1981	.485	50	53	103	3.56	404	24	4	24	922.1	909	365	75	273	20	36	3,878	13	3.94	2.66	1.48	0.73	10.4	7.0	1.28	.269	3.95	8.87
9	Giants	414	111	1981	.505	56	55	111	3.28	561	8	3	33	1009.1	970	368	57	393	24	56	4,302	36	5.00	3.50	1.43	0.51	13.0	9.1	1.35	.279	3.69	8.65
10	Braves	416	107	1981	.472	50	56	107	3.45	471	11	4	24	968.0	936	371	62	330	11	31	4,078	25	4.38	3.07	1.43	0.58	11.5	8.1	1.31	.273	3.87	8.70
11	Cardinals	417	103	1981	.578	59	43	103	3.63	388	11	2	33	943.0	902	380	52	290	15	45	3,910	22	3.70	2.77	1.34	0.50	9.9	7.4	1.26	.269	3.98	8.61
12	White Sox	423	106	1981	.509	54	52	106	3.47	529	20	6	23	940.2	891	363	73	336	24	17	3,964	24	5.06	3.21	1.57	0.70	13.3	8.5	1.30	.272	4.05	8.52
13	Pirates	425	103	1981	.451	46	56	103	3.56	492	11	4	29	942.0	953	373	60	346	15	51	4,029	32	4.70	3.31	1.42	0.57	12.2	8.6	1.38	.287	4.06	9.11
14	Orioles	430	154	1972	.519	80	74	154	2.53	788	62	18	21	1371.2	1,116	386	85	395	15	52	5,493	35	5.17	2.59	1.99	0.56	14.3	7.2	1.10	.245	2.82	7.32
15	Mets	432	105	1981	.398	41	62	105	3.55	490	7	1	24	926.1	906	365	74	336	13	35	3,951	26	4.76	3.26	1.46	0.72	12.4	8.5	1.34	.274	4.20	8.80
16	Orioles	437	105	1981	.562	59	46	105	3.70	489	25	7	23	940.0	923	386	83	347	14	22	3,970	29	4.68	3.32	1.41	0.79	12.3	8.7	1.35	.277	4.18	8.84
17	Reds	440	108	1981	.611	66	42	108	3.73	593	25	10	20	965.2	863	400	67	393	12	40	4,065	27	5.53	3.66	1.51	0.62	14.6	9.7	1.30	.265	4.10	8.04
18	Indians	442	103	1981	.505	52	51	103	3.88	569	33	9	13	931.0	989	401	67	311	10	15	4,003	30	5.50	3.01	1.83	0.65	14.2	7.8	1.40	.303	4.27	9.56
19	Braves	448	114	1994	.596	68	46	114	3.57	865	16	4	26	1026.1	929	407	76	378	22	52	4,322	35	7.59	3.31	2.29	0.67	20.0	8.7	1.27	.286	3.93	8.15
20	Angels	453	110	1981	.464	51	59	110	3.70	426	27	5	19	971.1	958	399	81	323	21	24	4,089	18	3.95	2.99	1.32	0.75	10.4	7.9	1.32	.271	4.20	8.88
21	Expos	454	114	1994	.649	74	40	114	3.56	805	4	2	46	1036.2	970	410	100	288	38	28	4,329	32	6.99	2.50	2.80	0.87	18.6	6.7	1.21	.281	3.94	8.42
22	Padres	455	110	1981	.373	41	69	110	3.72	492	9	3	23	1002.0	1,013	414	64	414	17	59	4,297	30	4.42	3.72	1.19	0.57	11.4	9.6	1.42	.287	4.09	9.10
23	Athletics	457	155	1972	.600	93	62	155	2.58	862	42	15	43	1417.2	1,170	406	96	418	19	41	5,718	29	5.47	2.65	2.06	0.61	15.1	7.3	1.12	.248	2.90	7.43
24	Brewers	459	109	1981	.569	62	47	109	3.91	448	11	1	35	986.0	994	428	72	352	11	33	4,181	31	4.09	3.21	1.27	0.66	10.7	8.4	1.37	.280	4.19	9.07
25	Blue Jays	466	106	1981	.349	37	69	106	3.81	451	20	2	18	953.1	908	404	72	377	36	27	4,089	41	4.26	3.56	1.20	0.68	11.0	9.2	1.35	.265	4.40	8.57