The Baltimore Orioles allowed the most runs by a team in 2009, with 876 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	Orioles	876	2009	162	.395	64	98	162	5.15	933	2	0	31	1429.0	1,633	817	218	546	51	45	6,359	31	5.88	3.44	1.71	1.37	14.7	8.6	1.52	.307	5.52	10.28
2	Nationals	874	2009	162	.364	59	103	162	5.00	911	6	1	33	1424.1	1,533	791	173	629	48	59	6,349	74	5.76	3.97	1.45	1.09	14.3	9.9	1.52	.296	5.52	9.69
3	Indians	865	2009	162	.401	65	97	162	5.06	986	5	2	25	1434.0	1,570	806	183	598	45	31	6,354	49	6.19	3.75	1.65	1.15	15.5	9.4	1.51	.305	5.43	9.85
4	Royals	842	2009	162	.401	65	97	162	4.83	1,153	10	5	34	1426.0	1,486	765	166	600	51	28	6,265	89	7.28	3.79	1.92	1.05	18.4	9.6	1.46	.307	5.31	9.38
5	Brewers	818	2009	162	.494	80	82	162	4.83	1,104	1	0	44	1435.0	1,498	770	207	607	65	60	6,352	61	6.92	3.81	1.82	1.30	17.4	9.6	1.47	.295	5.13	9.40
6	Diamondbacks	782	2009	162	.432	70	92	162	4.42	1,158	4	1	36	1447.2	1,470	711	168	525	53	27	6,267	79	7.20	3.26	2.21	1.04	18.5	8.4	1.38	.298	4.86	9.14
7	Blue Jays	771	2009	162	.463	75	87	162	4.47	1,181	10	4	25	1451.0	1,509	720	181	551	58	26	6,281	43	7.33	3.42	2.14	1.12	18.8	8.8	1.42	.308	4.78	9.36
8	Astros	770	2009	162	.457	74	88	162	4.54	1,144	5	1	39	1430.0	1,521	722	176	546	50	56	6,237	43	7.20	3.44	2.10	1.11	18.3	8.8	1.45	.311	4.85	9.57
9	Padres	769	2009	162	.463	75	87	162	4.37	1,187	2	1	45	1450.2	1,422	704	167	603	45	58	6,273	52	7.36	3.74	1.97	1.04	18.9	9.6	1.40	.294	4.77	8.82
10	Pirates	768	2009	161	.385	62	99	161	4.59	919	5	2	28	1418.1	1,491	723	152	563	47	37	6,144	52	5.83	3.57	1.63	0.96	15.0	9.2	1.45	.300	4.87	9.46
11	Marlins	766	2009	162	.537	87	75	162	4.29	1,248	5	1	45	1446.1	1,425	690	160	601	45	60	6,299	59	7.77	3.74	2.08	1.00	19.8	9.5	1.40	.298	4.77	8.87
12	Twins	765	2009	163	.534	87	76	163	4.50	1,052	4	1	48	1453.0	1,542	726	185	466	58	20	6,274	43	6.52	2.89	2.26	1.15	16.8	7.4	1.38	.301	4.74	9.55
13	Athletics	761	2009	162	.463	75	87	162	4.26	1,124	2	2	38	1447.1	1,486	685	156	523	36	30	6,243	43	6.99	3.25	2.15	0.97	18.0	8.4	1.39	.302	4.73	9.24
14	Angels	761	2009	162	.599	97	65	162	4.45	1,062	9	6	51	1445.0	1,513	715	180	523	58	35	6,252	67	6.61	3.26	2.03	1.12	17.0	8.4	1.41	.301	4.74	9.42
15	Mets	757	2009	162	.432	70	92	162	4.45	1,031	3	2	39	1426.0	1,452	705	158	616	55	60	6,284	41	6.51	3.89	1.67	1.00	16.4	9.8	1.45	.292	4.78	9.16
16	Rays	754	2009	162	.519	84	78	162	4.33	1,125	3	3	41	1427.1	1,421	686	183	515	46	22	6,146	46	7.09	3.25	2.18	1.15	18.3	8.4	1.36	.289	4.75	8.96
17	Yankees	753	2009	162	.636	103	59	162	4.26	1,260	3	1	51	1450.0	1,386	687	181	574	71	28	6,247	66	7.82	3.56	2.20	1.12	20.2	9.2	1.35	.290	4.67	8.60
18	Tigers	745	2009	163	.528	86	77	163	4.29	1,102	4	1	42	1447.0	1,449	690	182	594	41	42	6,240	48	6.85	3.69	1.86	1.13	17.7	9.5	1.41	.293	4.63	9.01
19	Rangers	740	2009	162	.537	87	75	162	4.38	1,016	8	3	45	1434.2	1,432	698	171	531	70	14	6,172	45	6.37	3.33	1.91	1.07	16.5	8.6	1.37	.288	4.64	8.98
20	Red Sox	736	2009	162	.586	95	67	162	4.35	1,230	8	2	41	1436.2	1,494	695	167	530	68	24	6,283	42	7.71	3.32	2.32	1.05	19.6	8.4	1.41	.309	4.61	9.36
21	White Sox	732	2009	162	.488	79	83	162	4.14	1,119	4	1	36	1439.2	1,438	663	169	507	41	41	6,155	55	7.00	3.17	2.21	1.06	18.2	8.2	1.35	.294	4.58	8.99
22	Reds	723	2009	162	.481	78	84	162	4.18	1,069	6	4	41	1458.1	1,420	677	188	577	65	36	6,253	45	6.60	3.56	1.85	1.16	17.1	9.2	1.37	.283	4.46	8.76
23	Rockies	715	2009	162	.568	92	70	162	4.22	1,154	5	2	45	1438.1	1,427	675	141	528	46	51	6,171	48	7.22	3.30	2.19	0.88	18.7	8.6	1.36	.299	4.47	8.93
24	Phillies	709	2009	162	.574	93	69	162	4.16	1,153	8	5	44	1455.2	1,479	673	189	489	75	31	6,263	28	7.13	3.02	2.36	1.17	18.4	7.8	1.35	.296	4.38	9.14
25	Mariners	692	2009	162	.525	85	77	162	3.87	1,043	4	2	49	1452.2	1,359	625	172	534	43	13	6,159	61	6.46	3.31	1.95	1.07	16.9	8.7	1.30	.272	4.29	8.42