which pitchers have at least 20 wins in a season for the cubs since 1920

Grover Alexander was credited with 27 wins for the Cubs in 1920.

	NAME	W	SEASON	TM	L	W%	G	GS	ERA	SO	CG	SHO	SV	IP	H	ER	R	HR	BB	HBP	GF	IBB	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	ERA-	FIP	FIP-	H/9	PRAA
1	Grover Alexander G. Alexander	27	1920	CHC	14	.659	46	40	1.91	173	33	7	5	363.1	335	77	96	8	69	1	6		1,447	3	4.29	1.71	2.51	0.20	12.0	4.8	1.11	.273	2.38	61	2.66	81	8.30	25
2	Grover Alexander G. Alexander	22	1923	CHC	12	.647	39	36	3.19	72	26	3	2	305.0	308	108	128	17	30	0	2		1,246	2	2.12	0.89	2.40	0.50	5.8	2.4	1.11	.258	3.78	79	3.48	87	9.09	17.9
3	Charlie Root C. Root	26	1927	CHC	15	.634	48	36	3.76	145	21	4	2	309.0	296	129	148	16	117	9	12		1,316	3	4.22	3.41	1.24	0.47	11.0	8.9	1.34	.272	4.31	98	3.98	103	8.62	-4.5
4	Pat Malone P. Malone	22	1929	CHC	10	.688	40	30	3.57	166	19	5	2	267.0	283	106	120	12	102	6	7		1,152	6	5.60	3.44	1.63	0.40	14.4	8.9	1.44	.313	4.04	77	3.72	82	9.54	23.8
5	Pat Malone P. Malone	20	1930	CHC	9	.690	45	35	3.94	142	22	1	5	271.2	290	119	145	14	96	6	8		1,197	4	4.70	3.18	1.48	0.46	11.9	8.0	1.42	.294	4.80	80	4.25	87	9.61	18.7
6	Lon Warneke L. Warneke	22	1932	CHC	6	.786	35	32	2.37	106	25	4	0	277.0	247	73	84	12	64	2	2		1,117	5	3.44	2.08	1.66	0.39	9.5	5.7	1.12	.252	2.73	62	3.53	89	8.03	12.7
7	Guy Bush G. Bush	20	1933	CHC	12	.625	41	32	2.75	84	20	4	2	259.0	261	79	95	9	68	1	8		1,101	6	2.92	2.36	1.24	0.31	7.6	6.2	1.27	.268	3.30	85	3.40	98	9.07	1.1
8	Lon Warneke L. Warneke	22	1934	CHC	10	.688	43	35	3.21	143	23	3	3	291.1	273	104	116	16	66	2	7		1,198	4	4.42	2.04	2.17	0.49	11.9	5.5	1.16	.265	3.58	81	3.55	89	8.43	14.8
9	Bill Lee B. Lee	20	1935	CHC	6	.769	39	32	2.96	100	18	3	1	252.0	241	83	106	11	84	5	5		1,058	7	3.57	3.00	1.19	0.39	9.5	7.9	1.29	.268	3.79	75	3.89	98	8.61	2
10	Lon Warneke L. Warneke	20	1935	CHC	13	.606	42	30	3.06	120	20	1	4	261.2	257	89	102	19	50	3	11		1,066	10	4.13	1.72	2.40	0.65	11.3	4.7	1.17	.272	3.51	78	3.69	93	8.84	7.9
11	Bill Lee B. Lee	22	1938	CHC	9	.710	44	37	2.66	121	19	9	2	291.0	281	86	95	18	74	2	5		1,194	3	3.74	2.29	1.64	0.56	10.1	6.2	1.22	.269	2.94	70	3.68	92	8.69	10.8
12	Claude Passeau C. Passeau	20	1940	CHC	13	.606	46	31	2.50	124	20	4	5	280.2	259	78	97	8	59	4	13		1,172	0	3.98	1.89	2.10	0.26	10.6	5.0	1.13	.257	3.11	66	3.00	77	8.31	28.2
13	Hank Wyse H. Wyse	22	1945	CHC	10	.688	38	34	2.68	77	23	2	0	278.1	272	83	95	17	55	5	3		1,139	3	2.49	1.78	1.40	0.55	6.8	4.8	1.17	.259	3.07	72	3.43	94	8.80	5.9
14	Dick Ellsworth D. Ellsworth	22	1963	CHC	10	.688	37	37	2.11	185	19	4	0	290.2	223	68	75	14	75	2	0	7	1,160	3	5.73	2.32	2.47	0.43	15.9	6.5	1.03	.236	2.32	62	2.63	77	6.90	24.6
15	Larry Jackson L. Jackson	24	1964	CHC	11	.686	40	38	3.14	148	19	3	0	297.2	265	104	114	17	58	1	1	8	1,200	4	4.47	1.75	2.55	0.51	12.3	4.8	1.09	.254	3.45	85	2.95	83	8.01	20
16	Fergie Jenkins F. Jenkins	20	1967	CHC	13	.606	38	38	2.80	236	20	3	0	289.1	230	90	101	30	83	4	0	8	1,156	2	7.34	2.58	2.84	0.93	20.4	7.2	1.08	.249	3.14	80	3.16	93	7.15	7.7
17	Fergie Jenkins F. Jenkins	20	1968	CHC	15	.571	40	40	2.63	260	20	3	0	308.0	255	90	96	26	65	3	0	7	1,231	6	7.60	1.90	4.00	0.76	21.1	5.3	1.04	.261	2.81	82	2.46	81	7.45	19.1
18	Bill Hands B. Hands	20	1969	CHC	14	.588	41	41	2.49	181	18	3	0	300.0	268	83	102	21	73	6	0	8	1,220	5	5.43	2.19	2.48	0.63	14.8	6.0	1.14	.263	3.06	64	3.00	80	8.04	24.5
19	Fergie Jenkins F. Jenkins	21	1969	CHC	15	.583	43	42	3.21	273	23	7	1	311.1	284	111	122	27	71	8	1	15	1,275	7	7.89	2.05	3.85	0.78	21.4	5.6	1.14	.287	3.53	82	2.64	70	8.21	36.8
20	Fergie Jenkins F. Jenkins	22	1970	CHC	16	.579	40	39	3.39	274	24	3	0	313.0	265	118	128	30	60	7	1	6	1,265	9	7.88	1.73	4.57	0.86	21.7	4.7	1.04	.263	3.68	76	2.77	65	7.62	48.3
21	Fergie Jenkins F. Jenkins	24	1971	CHC	13	.649	39	39	2.77	263	30	3	0	325.0	304	100	114	29	37	5	0	6	1,299	3	7.28	1.02	7.11	0.80	20.2	2.8	1.05	.285	3.16	73	2.38	64	8.42	45.3
22	Fergie Jenkins F. Jenkins	20	1972	CHC	12	.625	36	36	3.20	184	23	5	0	289.1	253	103	111	32	62	7	0	7	1,176	3	5.72	1.93	2.97	1.00	15.6	5.3	1.09	.248	3.45	85	3.27	90	7.87	11.4
23	Rick Reuschel R. Reuschel	20	1977	CHC	10	.667	39	37	2.79	166	8	4	1	252.0	233	78	84	13	74	5	2	11	1,030	9	5.93	2.64	2.24	0.46	16.1	7.2	1.22	.285	3.00	65	3.02	72	8.32	31.3
24	Greg Maddux G. Maddux	20	1992	CHC	11	.645	35	35	2.18	199	9	4	0	268.0	201	65	68	7	70	14	0	7	1,061	5	6.68	2.35	2.84	0.24	18.8	6.6	1.01	.252	2.28	61	2.57	71	6.75	30.5
25	Jon Lieber J. Lieber	20	2001	CHC	6	.769	34	34	3.80	148	5	1	0	232.1	226	98	104	25	41	7	0	4	958	4	5.73	1.59	3.61	0.97	15.4	4.3	1.15	.273	4.03	89	3.79	86	8.75	15.8