The St. Louis Cardinals gave up the fewest runs by a team in May 2009, with 99 runs.

	TEAM	R	MONTH	G	W%	W	L	ERA	SO	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	Cardinals	99	May 2009	27	.481	13	14	3.56	176	1	6	237.2	213	94	20	75	15	1	990	1	6.66	2.84	2.35	0.76	17.8	7.6	1.21	.274	3.75	8.07
2	Dodgers	104	May 2009	29	.690	20	9	3.42	223	1	6	266.0	232	101	18	131	11	13	1,138	12	7.55	4.43	1.70	0.61	19.6	11.5	1.36	.283	3.52	7.85
3	Tigers	106	May 2009	28	.607	17	11	3.57	213	1	7	249.2	223	99	23	94	5	4	1,045	6	7.68	3.39	2.27	0.83	20.4	9.0	1.27	.282	3.82	8.04
4	Rangers	107	May 2009	29	.690	20	9	3.57	149	2	10	260.0	245	103	27	83	13	0	1,079	7	5.16	2.87	1.80	0.93	13.8	7.7	1.26	.270	3.70	8.48
5	Cubs	109	May 2009	28	.536	15	13	3.95	215	0	8	239.0	212	105	27	98	11	6	1,018	13	8.10	3.69	2.19	1.02	21.1	9.6	1.30	.277	4.10	7.98
6	Mets	111	May 2009	28	.679	19	9	3.34	196	0	12	256.0	245	95	17	105	9	10	1,107	6	6.89	3.69	1.87	0.60	17.7	9.5	1.37	.292	3.90	8.61
7	Brewers	114	May 2009	28	.643	18	10	3.85	191	0	12	248.0	219	106	37	93	9	4	1,042	12	6.93	3.38	2.05	1.34	18.3	8.9	1.26	.256	4.14	7.95
8	Padres	115	May 2009	28	.500	14	14	3.83	212	0	8	251.1	214	107	23	105	9	14	1,061	9	7.59	3.76	2.02	0.82	20.0	9.9	1.27	.268	4.12	7.66
9	Giants	116	May 2009	29	.517	15	14	3.75	219	0	7	261.2	253	109	23	109	6	9	1,129	8	7.53	3.75	2.01	0.79	19.4	9.7	1.38	.298	3.99	8.70
10	Reds	124	May 2009	28	.536	15	13	4.08	200	0	6	260.0	242	118	33	104	12	8	1,104	7	6.92	3.60	1.92	1.14	18.1	9.4	1.33	.277	4.29	8.38
11	Yankees	127	May 2009	28	.607	17	11	4.28	211	1	6	254.1	251	121	42	112	15	4	1,113	8	7.47	3.96	1.88	1.49	19.0	10.1	1.43	.285	4.49	8.88
12	White Sox	128	May 2009	28	.464	13	15	4.17	200	0	8	243.2	251	113	28	86	5	8	1,044	9	7.39	3.18	2.33	1.03	19.2	8.2	1.38	.308	4.73	9.27
13	Red Sox	129	May 2009	29	.517	15	14	4.41	216	0	7	255.0	274	125	26	93	18	8	1,130	11	7.62	3.28	2.32	0.92	19.1	8.2	1.44	.319	4.55	9.67
14	Blue Jays	129	May 2009	29	.483	14	15	4.23	184	0	5	257.1	263	121	35	73	10	6	1,087	6	6.44	2.55	2.52	1.22	16.9	6.7	1.31	.290	4.51	9.20
15	Angels	131	May 2009	28	.571	16	12	4.59	172	1	8	251.0	253	128	27	91	15	6	1,093	10	6.17	3.26	1.89	0.97	15.7	8.3	1.37	.287	4.70	9.07
16	Phillies	133	May 2009	28	.607	17	11	4.58	193	0	9	251.1	251	128	35	94	20	7	1,096	4	6.91	3.37	2.05	1.25	17.6	8.6	1.37	.286	4.76	8.99
17	Braves	134	May 2009	29	.517	15	14	4.14	205	0	6	261.0	253	120	19	93	8	10	1,108	14	7.07	3.21	2.20	0.66	18.5	8.4	1.33	.299	4.62	8.72
18	Twins	138	May 2009	30	.467	14	16	4.43	179	0	6	266.0	273	131	43	85	9	4	1,128	11	6.06	2.88	2.11	1.45	15.9	7.5	1.35	.283	4.67	9.24
19	Pirates	141	May 2009	29	.379	11	18	4.84	160	0	6	249.0	263	134	24	97	11	4	1,083	11	5.78	3.51	1.65	0.87	14.8	9.0	1.45	.302	5.10	9.51
20	Orioles	144	May 2009	29	.483	14	15	4.83	166	0	7	255.1	264	137	32	99	11	10	1,110	4	5.85	3.49	1.68	1.13	15.0	8.9	1.42	.289	5.08	9.31
21	Mariners	146	May 2009	29	.379	11	18	4.41	199	0	6	265.1	272	130	37	119	7	4	1,166	11	6.75	4.04	1.67	1.26	17.1	10.2	1.47	.292	4.95	9.23
22	Rockies	147	May 2009	29	.414	12	17	4.44	192	1	6	255.2	276	126	16	77	10	4	1,112	9	6.76	2.71	2.49	0.56	17.3	6.9	1.38	.318	5.17	9.72
23	Royals	149	May 2009	28	.393	11	17	4.57	181	1	3	248.0	281	126	14	91	9	8	1,097	18	6.57	3.30	1.99	0.51	16.5	8.3	1.50	.333	5.41	10.20
24	Diamondbacks	149	May 2009	29	.448	13	16	4.65	208	0	11	265.0	286	137	35	95	9	7	1,157	13	7.06	3.23	2.19	1.19	18.0	8.2	1.44	.310	5.06	9.71
25	Astros	150	May 2009	27	.407	11	16	4.95	193	0	6	238.0	264	131	34	92	9	6	1,062	9	7.30	3.48	2.10	1.29	18.2	8.7	1.50	.313	5.67	9.98