The Chicago Cubs have averaged a win percentage of .479 since 1945.

	TEAM	W%	SEASON	W	L	G	AB	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	AVG	OBP	SLG	OPS
1	Cubs	.636	1945	98	56	155	5,298	735	1,465	229	52	57	674	555	32	462	69		6,035	1,969	338	150			93	.277	.349	.372	.720
2	Cubs	.536	1946	82	71	155	5,298	626	1,344	223	50	56	566	586	24	599	43		6,024	1,835	329	116			130	.254	.331	.346	.677
3	Cubs	.448	1947	69	85	155	5,305	567	1,373	231	48	71	540	469	19	578	22		5,857	1,913	350	64			112	.259	.321	.361	.682
4	Cubs	.416	1948	64	90	155	5,352	597	1,402	225	44	87	564	444	29	574	39		5,895	1,976	356	70			104	.262	.322	.369	.691
5	Cubs	.396	1949	61	93	154	5,214	593	1,336	212	53	97	539	396	26	573	53		5,723	1,945	362	87			121	.256	.312	.373	.685
6	Cubs	.418	1950	64	89	154	5,230	643	1,298	224	47	161	615	479	31	767	46		5,794	2,099	432	54			122	.248	.315	.401	.716
7	Cubs	.403	1951	62	92	155	5,307	614	1,327	200	47	103	572	477	22	647	63	30	5,862	1,930	350	56			139	.250	.315	.364	.678
8	Cubs	.500	1952	77	77	155	5,330	628	1,408	223	45	107	595	422	21	712	50	40	5,836	2,042	375	63			133	.264	.321	.383	.704
9	Cubs	.422	1953	65	89	155	5,272	633	1,372	204	57	137	588	514	14	746	49	21	5,873	2,101	398	73			140	.260	.328	.399	.726
10	Cubs	.416	1954	64	90	154	5,359	700	1,412	229	45	159	640	478	32	693	46	31	5,965	2,208	433	56	40		119	.263	.325	.412	.737
11	Cubs	.471	1955	72	81	154	5,214	626	1,287	187	55	164	597	428	22	806	37	35	5,766	2,076	406	69	33	45	107	.247	.305	.398	.703
12	Cubs	.390	1956	60	94	157	5,260	597	1,281	202	50	142	563	446	13	776	55	38	5,852	2,009	394	87	46	60	99	.244	.302	.382	.684
13	Cubs	.403	1957	62	92	156	5,369	628	1,312	223	31	147	590	461	26	989	28	25	5,947	2,038	401	58	33	34	104	.244	.305	.380	.685
14	Cubs	.468	1958	72	82	154	5,289	709	1,402	207	49	182	666	487	45	853	39	23	5,902	2,253	438	42	39	50	128	.265	.330	.426	.756
15	Cubs	.481	1959	74	80	155	5,296	673	1,321	209	44	163	635	498	43	911	32	19	5,939	2,107	416	62	40	63	106	.249	.317	.398	.715
16	Cubs	.390	1960	60	94	156	5,311	634	1,293	213	48	119	600	531	19	897	51	34	5,960	1,959	380	64	35	69	109	.243	.313	.369	.681
17	Cubs	.416	1961	64	90	156	5,344	689	1,364	238	51	176	650	539	32	1,027	35	25	6,000	2,232	465	52	33	64	115	.255	.325	.418	.743
18	Cubs	.364	1962	59	103	162	5,534	632	1,398	196	56	126	600	504	39	1,044	78	50	6,173	2,084	378	54	42	43	131	.253	.317	.377	.694
19	Cubs	.506	1963	82	80	162	5,404	570	1,286	205	44	127	530	439	36	1,049	68	60	5,987	1,960	376	64	44	57	112	.238	.297	.363	.660
20	Cubs	.469	1964	76	86	162	5,545	649	1,391	239	50	145	609	499	25	1,041	70	49	6,157	2,165	434	55	33	51	101	.251	.314	.390	.704
21	Cubs	.444	1965	72	90	164	5,540	635	1,316	202	33	134	590	532	43	948	65	47	6,205	1,986	369	48	42	62	115	.238	.307	.358	.666
22	Cubs	.364	1966	59	103	162	5,592	644	1,418	203	43	140	603	457	47	998	76	47	6,213	2,127	386	80	37	53	112	.254	.313	.380	.694
23	Cubs	.540	1967	87	74	162	5,463	702	1,373	211	49	128	642	509	34	912	63	50	6,148	2,066	388	93	49	84	112	.251	.316	.378	.695
24	Cubs	.519	1968	84	78	163	5,458	612	1,319	203	43	130	576	415	36	854	41	30	6,020	1,998	376	74	37	58	103	.242	.298	.366	.664
25	Cubs	.568	1969	92	70	163	5,530	720	1,400	215	40	142	671	559	36	928	30	32	6,243	2,121	397	72	46	58	111	.253	.323	.384	.707
	Total	.479		6,101	6,637	12,771	435,336	54,899	111,054	19,564	2,987	11,859	51,685	40,612	3,201	79,273	6,241	3,095	487,320	172,169	34,410	5,224	2,947	3,531	9,350	.255	.321	.395	.717