most unearned runs allowed in 1 season for cubs

The Chicago Colts allowed their most runs in a season in 1894, with 1,080 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	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
2	Cubs	920	1999	162	.414	67	95	162	5.27	980	11	3	32	1430.2	1,619	837	221	529	27	48	6,359	59	6.16	3.33	1.85	1.39	15.4	8.3	1.50	.304	5.79	10.18
3	Cubs	904	2000	162	.401	65	97	162	5.25	1,143	10	1	39	1454.2	1,505	849	231	658	62	45	6,451	45	7.07	4.07	1.74	1.43	17.7	10.2	1.49	.292	5.59	9.31
4	Colts	894	1897	138	.447	59	73	138	4.53	361	131		1	1197.0	1,485	603	30	433	64		5,420	32	2.71	3.26	0.83	0.23	6.7	8.0	1.60	.321	6.72	11.17
5	Colts	874	1893	128	.441	56	71	128	4.81	273	101		5	1117.1	1,278	597	26	553	64		5,202	41	2.20	4.45	0.49	0.21	5.2	10.6	1.64	.292	7.04	10.29
6	Cubs	870	1930	156	.584	90	64	156	4.80	601	67	5	16	1403.2	1,642	749	111	528	26		6,285	28	3.85	3.39	1.14	0.71	9.6	8.4	1.55	.305	5.58	10.53
7	Colts	854	1895	133	.554	72	58	133	4.67	297	119		1	1150.2	1,422	597	38	432	69		5,258	34	2.32	3.38	0.69	0.30	5.6	8.2	1.61	.313	6.68	11.12
8	Cubs	839	2021	162	.438	71	91	162	4.87	1,358	1	0	40	1412.2	1,386	765	235	596	98	25	6,202	60	8.65	3.80	2.28	1.50	21.9	9.6	1.40	.294	5.35	8.83
9	Cubs	835	1953	155	.422	65	89	155	4.79	623	38	3	22	1359.0	1,491	723	151	554	38		6,077	27	4.13	3.67	1.12	1.00	10.3	9.1	1.50	.284	5.53	9.87
10	Cubs	834	2006	162	.407	66	96	162	4.74	1,250	2	1	29	1439.0	1,396	758	210	687	67	44	6,366	68	7.82	4.30	1.82	1.31	19.6	10.8	1.45	.286	5.22	8.73
11	Cubs	827	1975	162	.463	75	87	162	4.49	850	27	5	33	1444.1	1,587	721	130	551	40	59	6,383	35	5.30	3.43	1.54	0.81	13.3	8.6	1.48	.303	5.15	9.89
12	Cubs	827	1962	162	.364	59	103	162	4.54	783	29	3	26	1438.1	1,509	725	159	601	46	60	6,309	66	4.90	3.76	1.30	0.99	12.4	9.5	1.47	.286	5.17	9.44
13	Cubs	826	1974	162	.407	66	96	162	4.28	895	23	5	26	1466.1	1,593	697	122	576	40	72	6,518	61	5.49	3.54	1.55	0.75	13.7	8.8	1.48	.301	5.07	9.78
14	White Stockings	814	1889	136	.508	67	65	136	3.73	434	123		2	1237.0	1,313	512	71	408	42		5,417	50	3.16	2.97	1.06	0.52	8.0	7.5	1.39	.278	5.92	9.55
15	Cubs	809	1966	162	.364	59	103	162	4.33	908	28	2	25	1458.0	1,513	702	184	479	28	64	6,283	40	5.60	2.96	1.90	1.14	14.5	7.6	1.37	.284	4.99	9.34
16	Cubs	808	1922	156	.519	80	74	156	4.34	402	74	8	13	1397.2	1,579	674	77	475	55		6,097	29	2.59	3.06	0.85	0.50	6.6	7.8	1.47	.295	5.20	10.17
17	Colts	804	1896	132	.555	71	57	132	4.44	354	118		1	1161.1	1,307	573	30	467	81		5,189	28	2.74	3.62	0.76	0.23	6.8	9.0	1.53	.300	6.23	10.13
18	Cubs	801	1987	161	.472	76	85	161	4.55	1,024	11	4	48	1434.2	1,524	726	159	628	27	67	6,311	58	6.42	3.94	1.63	1.00	16.2	10.0	1.50	.305	5.02	9.56
19	Cubs	800	1961	156	.416	64	90	156	4.48	755	34	6	25	1385.0	1,492	690	165	465	35	47	6,021	50	4.91	3.02	1.62	1.07	12.5	7.7	1.41	.288	5.20	9.70
20	Cubs	792	1998	163	.552	90	73	163	4.47	1,207	7	5	56	1477.1	1,528	733	180	575	48	48	6,472	48	7.35	3.50	2.10	1.10	18.6	8.9	1.42	.302	4.82	9.31
21	Cubs	781	1986	160	.438	70	90	160	4.49	962	11	4	42	1445.0	1,546	721	143	557	19	78	6,248	55	5.99	3.47	1.73	0.89	15.4	8.9	1.46	.307	4.86	9.63
22	Cubs	776	1960	156	.390	60	94	156	4.35	805	36	5	24	1402.2	1,393	678	152	565	42	56	6,075	39	5.17	3.63	1.42	0.98	13.3	9.3	1.40	.275	4.98	8.94
23	Cubs	775	1921	153	.418	64	89	153	4.39	441	72	6	7	1363.0	1,605	665	67	409	40		5,928	17	2.91	2.70	1.08	0.44	7.4	6.9	1.48	.309	5.12	10.60
24	Cubs	774	1990	162	.475	77	85	162	4.34	877	13	4	42	1442.2	1,510	695	121	572	28	85	6,320	62	5.47	3.57	1.53	0.75	13.9	9.1	1.44	.294	4.83	9.42
25	Cubs	773	1925	154	.442	68	86	154	4.41	435	75	5	10	1370.0	1,575	671	102	485	29		6,026	12	2.86	3.19	0.90	0.67	7.2	8.0	1.50	.296	5.08	10.35