The Cleveland Spiders have allowed the most runs by a team in a season, with 1,252 runs in 1899.

	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	Spiders	1,252	1899	154	.130	20	134	154	6.37	215	138		0	1264.0	1,844	894	43	527	109		6,076	40	1.53	3.75	0.41	0.31	3.5	8.7	1.88	.348	8.91	13.13
2	Alleghenys	1,235	1890	138	.169	23	113	138	5.97	381	119		0	1176.1	1,520	780	52	573	79		5,664	115	2.91	4.38	0.66	0.40	6.7	10.1	1.78	.321	9.45	11.63
3	Phillies	1,199	1930	156	.338	52	102	156	6.71	384	54	3	7	1372.2	1,993	1,024	142	543	33		6,549	23	2.52	3.56	0.71	0.93	5.9	8.3	1.85	.340	7.86	13.07
4	Bisons	1,199	1890	134	.273	36	96	134	6.11	351	125		0	1141.0	1,499	775	67	673	48		5,658	78	2.77	5.31	0.52	0.53	6.2	11.9	1.90	.317	9.46	11.82
5	Senators	1,122	1894	132	.341	45	87	132	5.51	190	102		4	1107.0	1,573	678	59	446	63		5,271	46	1.54	3.63	0.43	0.48	3.6	8.5	1.82	.335	9.12	12.79
6	Spiders	1,112	1887	133	.298	39	92	133	4.99	332	127		1	1136.0	1,472	630	34	533	61		5,378	125	2.63	4.22	0.62	0.27	6.2	9.9	1.76	.325	8.81	11.66
7	Reds	1,108	1894	134	.423	55	75	134	5.99	223	112		3	1165.1	1,615	775	85	500	56		5,528	35	1.72	3.86	0.45	0.66	4.0	9.0	1.81	.328	8.56	12.47
8	Tigers	1,103	1996	162	.327	53	109	162	6.38	957	10	4	22	1432.2	1,699	1,015	241	784	80	63	6,713	82	6.01	4.93	1.22	1.51	14.3	11.7	1.73	.313	6.93	10.67
9	Metropolitans	1,093	1887	138	.331	44	89	138	5.28	316	132		0	1180.1	1,545	693	39	406	50		5,475	92	2.41	3.10	0.78	0.30	5.8	7.4	1.65	.323	8.33	11.78
10	Colonels	1,091	1889	140	.196	27	111	140	4.81	451	127		1	1226.1	1,529	656	43	475	50		5,690	83	3.31	3.49	0.95	0.32	7.9	8.3	1.63	.318	8.01	11.22
11	Colonels	1,090	1895	133	.267	35	96	133	5.90	245	104		1	1117.1	1,520	732	40	469	63		5,290	48	1.97	3.78	0.52	0.32	4.6	8.9	1.78	.331	8.78	12.24
12	Browns	1,088	1897	133	.221	29	102	133	6.17	207	110		1	1136.1	1,594	779	54	454	71		5,380	40	1.64	3.60	0.46	0.43	3.8	8.4	1.80	.335	8.62	12.62
13	Colts	1,080	1894	137	.432	57	75	137	5.72	284	118		0	1163.0	1,575	739	43	569	64		5,556	38	2.20	4.40	0.50	0.33	5.1	10.2	1.84	.333	8.36	12.19
14	Senators	1,067	1891	139	.326	44	91	139	4.83	486	123		2	1181.0	1,420	634	44	566	105		5,604	83	3.70	4.31	0.86	0.34	8.7	10.1	1.68	.313	8.13	10.82
15	Browns	1,064	1936	155	.375	57	95	155	6.24	399	54	3	13	1348.1	1,776	935	115	609	47		6,382	44	2.66	4.07	0.66	0.77	6.3	9.5	1.77	.319	7.10	11.85
16	Senators	1,052	1895	133	.336	43	85	133	5.26	261	99		5	1111.1	1,515	649	55	470	69		5,275	24	2.11	3.81	0.56	0.45	4.9	8.9	1.79	.330	8.52	12.27
17	Athletics	1,045	1936	154	.346	53	100	154	6.08	405	68	3	11	1352.1	1,645	913	131	696	24		6,301	67	2.70	4.63	0.58	0.87	6.4	11.0	1.73	.300	6.95	10.95
18	Phillies	1,036	1929	154	.464	71	82	154	6.13	369	45	5	24	1348.0	1,743	918	122	616	39		6,303	21	2.46	4.11	0.60	0.81	5.9	9.8	1.75	.314	6.92	11.64
19	Browns	1,036	1895	136	.298	39	92	136	5.73	284	106		1	1161.1	1,572	739	64	443	48		5,430	20	2.20	3.43	0.64	0.50	5.2	8.2	1.74	.328	8.03	12.18
20	Browns	1,035	1939	156	.279	43	111	156	6.01	516	56	3	4	1371.1	1,724	916	133	739	29		6,474	32	3.39	4.85	0.70	0.87	8.0	11.4	1.80	.315	6.79	11.31
21	Senators	1,032	1893	130	.310	40	89	130	5.56	292	110		0	1139.0	1,485	704	54	574	60		5,489	39	2.31	4.54	0.51	0.43	5.3	10.5	1.81	.317	8.15	11.73
22	Cowboys	1,031	1889	139	.401	55	82	139	4.36	447	128		2	1204.1	1,373	583	51	457	60		5,460	91	3.34	3.42	0.98	0.38	8.2	8.4	1.52	.297	7.70	10.26
23	Rockies	1,028	1999	162	.444	72	90	162	6.01	1,032	12	1	33	1429.0	1,700	955	237	737	60	46	6,574	70	6.50	4.64	1.40	1.49	15.7	11.2	1.71	.325	6.47	10.71
24	Infants	1,027	1890	131	.423	55	75	131	4.23	325	115		0	1143.2	1,386	537	45	571	55		5,460	86	2.56	4.49	0.57	0.35	6.0	10.5	1.71	.300	8.08	10.91
25	Browns	1,023	1937	156	.299	46	108	156	6.00	468	55	2	8	1363.0	1,770	909	143	653	30		6,371	34	3.09	4.31	0.72	0.94	7.3	10.2	1.78	.320	6.75	11.69