The Seattle Mariners allowed the fewest runs by a team in 2001, with 627 runs.

	TEAM	R	SEASON	G	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	Mariners	627	2001	162	.716	116	46	162	3.54	1,051	8	4	56	1465.0	1,293	576	160	465	64	28	6,096	40	6.46	2.86	2.26	0.98	17.2	7.6	1.20	.260	3.85	7.94
2	Braves	643	2001	162	.543	88	74	162	3.59	1,133	5	5	41	1447.1	1,363	578	153	499	33	77	6,089	41	7.05	3.10	2.27	0.95	18.6	8.2	1.29	.283	4.00	8.48
3	Athletics	645	2001	162	.630	102	60	162	3.59	1,117	13	6	44	1463.1	1,384	583	153	440	46	49	6,115	42	6.87	2.71	2.54	0.94	18.3	7.2	1.25	.282	3.97	8.51
4	Diamondbacks	677	2001	162	.568	92	70	162	3.87	1,297	12	5	34	1459.2	1,352	627	195	461	59	30	6,090	45	8.00	2.84	2.81	1.20	21.3	7.6	1.24	.284	4.17	8.34
5	Cardinals	684	2001	162	.574	93	69	162	3.93	1,083	8	4	38	1435.1	1,389	627	196	526	72	36	6,121	45	6.79	3.30	2.06	1.23	17.7	8.6	1.33	.281	4.29	8.71
6	Cubs	701	2001	162	.543	88	74	162	4.03	1,344	8	2	41	1437.0	1,357	643	164	550	50	43	6,159	48	8.42	3.44	2.44	1.03	21.8	8.9	1.33	.294	4.39	8.50
7	Yankees	713	2001	161	.594	95	65	161	4.02	1,266	7	3	57	1451.1	1,429	649	158	465	55	29	6,174	54	7.85	2.88	2.72	0.98	20.5	7.5	1.31	.300	4.42	8.86
8	Mets	713	2001	162	.506	82	80	162	4.07	1,191	6	3	48	1445.2	1,418	654	186	438	43	60	6,107	53	7.41	2.73	2.72	1.16	19.5	7.2	1.28	.290	4.44	8.83
9	Phillies	719	2001	162	.531	86	76	162	4.15	1,086	8	3	47	1445.1	1,417	667	170	527	70	60	6,198	40	6.76	3.28	2.06	1.06	17.5	8.5	1.35	.287	4.48	8.82
10	Angels	730	2001	162	.463	75	87	162	4.20	947	6	0	43	1437.2	1,452	671	168	525	64	47	6,195	46	5.93	3.29	1.80	1.05	15.3	8.5	1.38	.286	4.57	9.09
11	Dodgers	744	2001	162	.531	86	76	162	4.25	1,212	3	1	46	1450.2	1,387	685	184	524	72	37	6,201	44	7.52	3.25	2.31	1.14	19.5	8.5	1.32	.286	4.62	8.61
12	Marlins	744	2001	162	.469	76	86	162	4.32	1,119	5	3	32	1438.0	1,397	691	151	617	70	53	6,227	40	7.00	3.86	1.81	0.95	18.0	9.9	1.40	.292	4.66	8.74
13	Red Sox	745	2001	161	.509	82	79	161	4.15	1,259	3	2	48	1448.0	1,412	667	146	544	93	50	6,272	54	7.83	3.38	2.31	0.91	20.1	8.7	1.35	.299	4.63	8.78
14	Giants	748	2001	162	.556	90	72	162	4.18	1,080	3	1	47	1463.1	1,437	680	145	579	33	49	6,294	50	6.64	3.56	1.87	0.89	17.2	9.2	1.38	.290	4.60	8.84
15	Blue Jays	753	2001	162	.494	80	82	162	4.28	1,041	7	5	41	1462.2	1,553	696	165	490	76	60	6,305	33	6.41	3.02	2.12	1.02	16.5	7.8	1.40	.306	4.63	9.56
16	Twins	766	2001	162	.525	85	77	162	4.51	965	12	5	45	1441.1	1,494	722	192	445	56	16	6,187	58	6.03	2.78	2.17	1.20	15.6	7.2	1.35	.287	4.78	9.33
17	Astros	769	2001	162	.574	93	69	162	4.37	1,228	7	1	48	1454.2	1,453	707	221	486	70	22	6,236	42	7.60	3.01	2.53	1.37	19.7	7.8	1.33	.291	4.76	8.99
18	White Sox	795	2001	162	.512	83	79	162	4.55	921	8	3	51	1433.1	1,465	725	181	500	88	38	6,200	57	5.78	3.14	1.84	1.14	14.9	8.1	1.37	.285	4.99	9.20
19	Brewers	806	2001	162	.420	68	94	162	4.64	1,057	3	2	28	1436.1	1,452	740	197	667	72	107	6,338	58	6.62	4.18	1.58	1.23	16.7	10.5	1.48	.289	5.05	9.10
20	Expos	812	2001	162	.420	68	94	162	4.68	1,103	5	3	28	1431.1	1,509	745	190	525	61	40	6,250	55	6.94	3.30	2.10	1.19	17.6	8.4	1.42	.302	5.11	9.49
21	Padres	812	2001	162	.488	79	83	162	4.52	1,088	5	1	46	1440.2	1,519	724	219	476	56	54	6,278	46	6.80	2.97	2.29	1.37	17.3	7.6	1.38	.293	5.07	9.49
22	Indians	821	2001	162	.562	91	71	162	4.64	1,218	3	0	42	1446.2	1,512	746	148	573	49	44	6,312	58	7.58	3.56	2.13	0.92	19.3	9.1	1.44	.315	5.11	9.41
23	Orioles	829	2001	162	.391	63	98	162	4.67	938	10	2	31	1432.1	1,504	744	194	528	74	28	6,273	37	5.89	3.32	1.78	1.22	15.0	8.4	1.42	.289	5.21	9.45
24	Reds	850	2001	162	.407	66	96	162	4.77	943	2	1	35	1442.2	1,572	765	198	515	48	46	6,324	53	5.88	3.21	1.83	1.24	14.9	8.1	1.45	.297	5.30	9.81
25	Pirates	858	2001	162	.383	62	100	162	5.05	908	8	2	36	1416.1	1,493	794	167	549	80	74	6,222	49	5.77	3.49	1.65	1.06	14.6	8.8	1.44	.293	5.45	9.49