Between the 1930 and 1939 seasons, Lefty Grove won the most games, with 199 wins.

Interpreted as:

most regular-season wins by MLB pitcher in 30s

	NAME	W	L	W%	G	GS	ERA	SO	CG	SHO	SV	IP	H	ER	R	HR	BB	HBP	GF	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	ERA-	FIP	FIP-	H/9	PRAA
1	Lefty Grove L. Grove	199	76	.724	351	268	2.91	1,313	197	26	31	2399.0	2,344	776	907	93	639	22	72	10,054	16	4.93	2.40	2.05	0.35	13.1	6.4	1.24	.282	3.40	62	3.33	73	8.79	326
2	Carl Hubbell C. Hubbell	188	104	.644	383	303	2.71	1,281	197	31	30	2596.2	2,437	782	917	147	467	39	66	10,584	34	4.44	1.62	2.74	0.51	12.1	4.4	1.12	.265	3.18	69	3.42	86	8.45	163.9
3	Red Ruffing R. Ruffing	175	98	.641	334	298	3.59	1,260	201	28	9	2439.0	2,327	972	1,123	150	858	24	31	10,351	24	4.65	3.17	1.47	0.55	12.2	8.3	1.31	.270	4.14	83	3.93	93	8.59	77.1
4	Wes Ferrell W. Ferrell	170	115	.596	323	293	4.08	867	207	16	8	2345.1	2,554	1,062	1,251	124	911	18	28	10,347	32	3.33	3.50	0.95	0.48	8.4	8.8	1.48	.288	4.80	87	4.25	93	9.80	86.7
5	Lefty Gomez L. Gomez	165	89	.650	322	278	3.24	1,337	163	26	10	2234.2	2,031	804	949	122	904	15	28	9,505	30	5.38	3.64	1.48	0.49	14.1	9.5	1.31	.268	3.82	75	3.79	90	8.18	98
6	Mel Harder M. Harder	158	123	.562	385	285	3.74	813	134	16	22	2326.0	2,557	967	1,168	101	692	41	71	10,102	22	3.15	2.68	1.17	0.39	8.0	6.9	1.40	.290	4.52	81	3.88	86	9.89	163.6
7	Larry French L. French	156	134	.538	430	304	3.42	901	161	32	14	2481.2	2,701	942	1,136	130	610	27	77	10,605	29	3.27	2.21	1.48	0.47	8.5	5.8	1.33	.288	4.12	86	3.81	93	9.80	77.7
8	Tommy Bridges T. Bridges	150	102	.595	309	266	3.76	1,207	156	25	8	2083.0	2,015	870	1,021	138	902	29	32	9,033	41	5.22	3.90	1.34	0.60	13.4	10.0	1.40	.278	4.41	81	4.10	91	8.71	93.4
9	Paul Derringer P. Derringer	148	137	.519	375	285	3.50	1,018	163	23	18	2343.2	2,584	911	1,083	93	481	27	68	9,948	40	3.91	1.85	2.12	0.36	10.2	4.8	1.31	.299	4.16	92	3.33	85	9.92	156.7
10	Dizzy Dean D. Dean	147	80	.648	305	219	2.96	1,144	151	26	31	1908.1	1,845	628	736	91	432	27	76	7,903	12	5.40	2.04	2.65	0.43	14.5	5.5	1.19	.282	3.47	75	3.19	78	8.70	192.3
11	Lon Warneke L. Warneke	144	85	.629	318	247	3.23	877	146	24	11	2021.0	1,993	725	845	126	555	21	46	8,471	45	3.91	2.47	1.58	0.56	10.4	6.6	1.26	.271	3.76	83	3.83	96	8.88	35.3
12	Earl Whitehill E. Whitehill	131	107	.550	317	282	4.53	783	134	8	5	2129.1	2,378	1,072	1,220	134	891	54	20	9,482	37	3.31	3.77	0.88	0.57	8.3	9.4	1.54	.294	5.16	101	4.50	103	10.05	-28.2
13	Bump Hadley B. Hadley	121	119	.504	374	257	4.21	1,006	98	10	20	2121.2	2,127	992	1,147	133	1,061	38	78	9,372	50	4.27	4.50	0.95	0.56	10.7	11.3	1.50	.280	4.87	92	4.50	101	9.02	-13.9
14	Freddie Fitzsimmons F. Fitzsimmons	120	96	.556	304	260	3.54	539	109	18	7	1937.2	2,021	763	912	119	499	15	33	8,171	40	2.50	2.32	1.08	0.55	6.6	6.1	1.30	.272	4.24	91	4.12	103	9.39	-25.8
15	Hal Schumacher H. Schumacher	117	81	.591	274	231	3.38	623	99	19	4	1736.2	1,716	652	775	95	593	16	25	7,376	44	3.23	3.07	1.05	0.49	8.4	8.0	1.33	.268	4.02	89	4.07	104	8.89	-34
16	Ted Lyons T. Lyons	117	115	.504	278	237	3.90	536	168	9	6	1972.0	2,203	855	1,038	130	525	15	34	8,501	24	2.45	2.40	1.02	0.59	6.3	6.2	1.38	.284	4.74	86	4.23	95	10.05	48.9
17	Alvin Crowder A. Crowder	115	79	.593	266	196	4.16	543	100	8	12	1592.2	1,717	737	818	95	472	10	43	6,837	14	3.07	2.67	1.15	0.54	7.9	6.9	1.37	.284	4.62	94	4.10	95	9.70	36.4
18	Charlie Root C. Root	114	89	.562	377	187	3.50	818	96	10	30	1829.1	1,870	711	812	114	466	47	123	7,716	15	4.02	2.29	1.76	0.56	10.6	6.0	1.28	.280	3.99	89	3.83	95	9.20	43.2
19	Guy Bush G. Bush	112	86	.566	316	194	4.02	498	99	9	16	1628.1	1,808	727	836	98	466	18	75	7,059	37	2.75	2.58	1.07	0.54	7.1	6.6	1.40	.286	4.62	101	4.16	104	9.99	-30.7
20	Johnny Allen J. Allen	108	45	.706	212	182	3.73	838	94	12	4	1406.1	1,323	583	654	66	547	27	22	5,970	50	5.36	3.50	1.53	0.42	14.0	9.2	1.33	.280	4.19	84	3.67	85	8.47	102.6
21	Bill Lee B. Lee	106	70	.602	240	201	3.21	640	110	23	8	1570.2	1,562	560	645	84	483	13	24	6,590	31	3.67	2.77	1.33	0.48	9.7	7.3	1.30	.275	3.70	82	3.88	96	8.95	30.1
22	Willis Hudlin W. Hudlin	105	106	.498	338	225	4.61	461	101	8	23	1736.1	2,053	889	1,042	87	571	21	69	7,714	27	2.39	2.96	0.81	0.45	6.0	7.4	1.51	.299	5.40	100	4.23	94	10.64	55.8
23	Ed Brandt E. Brandt	104	112	.481	314	225	3.57	743	125	17	17	1875.1	1,912	744	832	100	586	23	66	7,959	18	3.57	2.81	1.27	0.48	9.3	7.4	1.33	.278	3.99	94	3.96	102	9.18	-22.6
24	Van Mungo V. Mungo	101	99	.505	275	215	3.42	1,022	114	16	13	1715.1	1,593	652	771	73	685	23	48	7,313	44	5.36	3.59	1.49	0.38	14.0	9.4	1.33	.276	4.05	89	3.65	92	8.36	63.8
25	Danny MacFayden D. MacFayden	101	111	.476	313	253	3.87	600	128	13	5	1997.0	2,200	858	998	76	606	41	34	8,675	17	2.70	2.73	0.99	0.34	6.9	7.0	1.41	.289	4.50	98	3.98	100	9.91	-7.3