most wins by a pitcher in a season with no losses

Tom Zachary has the most wins in wins in a season, with 12 wins in 1929.

	NAME	W	L	SEASON	TM	W%	L%	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	Tom Zachary T. Zachary	12	0	1929	NYY	1.000	.000	26	11	2.48	35	7	2	2	119.2	131	33	43	5	30	2	9		512	1	2.63	2.26	1.17	0.38	6.8	5.9	1.35	.286	3.23	62	3.92	94	9.85	2.9
2	Dennis Lamp D. Lamp	11	0	1985	TOR	1.000	.000	53	1	3.32	68	0	0	2	105.2	96	39	42	7	27	0	11	3	426	5	5.79	2.30	2.52	0.60	16.0	6.3	1.16	.275	3.58	79	3.02	74	8.18	12.5
3	Aaron Small A. Small	10	0	2005	NYY	1.000	.000	15	9	3.20	37	1	1	0	76.0	71	27	27	4	24	5	1	0	316	0	4.38	2.84	1.54	0.47	11.7	7.6	1.25	.272	3.20	74	3.86	89	8.41	3.8
4	Howie Krist H. Krist	10	0	1941	SLN	1.000	.000	37	8	4.03	36	2	0	2	114.0	107	51	57	10	35	1	17		476	1	2.84	2.76	1.03	0.79	7.6	7.4	1.25	.246	4.50	108	4.12	107	8.45	-3.2
5	Frank DiPino F. DiPino	9	0	1989	STL	1.000	.000	67	0	2.45	44	0	0	0	88.1	73	24	26	6	20	0	8	7	347	2	4.48	2.04	2.20	0.61	12.7	5.8	1.05	.242	2.65	70	3.32	93	7.44	2.3
6	Ken Holtzman K. Holtzman	9	0	1967	CHC	1.000	.000	12	12	2.53	62	3	0	0	92.2	76	26	31	11	44	2	0	7	392	4	6.02	4.27	1.41	1.07	15.8	11.2	1.29	.238	3.01	72	4.23	125	7.38	-8.2
7	Joe Pate J. Pate	9	0	1926	PHA	1.000	.000	47	2	2.71	24	0	0	7	113.0	109	34	38	3	51	2	33		489	1	1.91	4.06	0.47	0.24	4.9	10.4	1.42	.259	3.03	67	4.24	105	8.68	-2.3
8	Nick Sandlin N. Sandlin	8	0	2024	CLE	1.000	.000	68	1	3.75	68	0	0	1	57.2	46	24	29	12	27	6	7	2	246	1	10.61	4.21	2.52	1.87	27.6	11.0	1.27	.256	4.53	94	5.22	129	7.18	-7.6
9	Nate Jones N. Jones	8	0	2012	CWS	1.000	.000	65	0	2.39	65	0	0	0	71.2	67	19	19	4	32	1	11	3	301	5	8.16	4.02	2.03	0.50	21.6	10.6	1.38	.317	2.39	56	3.38	79	8.41	7.1
10	Micah Owings M. Owings	8	0	2011	ARI	1.000	.000	33	4	3.57	44	0	0	0	63.0	56	25	27	8	23	2	2	0	263	3	6.29	3.29	1.91	1.14	16.7	8.7	1.25	.258	3.86	90	4.46	115	8.00	-4
11	Rheal Cormier R. Cormier	8	0	2003	PHI	1.000	.000	65	0	1.70	67	0	0	1	84.2	54	16	18	4	25	1	21	2	327	0	7.12	2.66	2.68	0.43	20.5	7.6	0.93	.217	1.91	41	2.98	70	5.74	12.1
12	Arthur Rhodes A. Rhodes	8	0	2001	SEA	1.000	.000	71	0	1.72	83	0	0	3	68.0	46	13	14	5	12	1	16	0	258	3	10.99	1.59	6.92	0.66	32.2	4.7	0.85	.261	1.85	40	2.13	49	6.09	16.9
13	Pat Mahomes P. Mahomes	8	0	1999	NYM	1.000	.000	39	0	3.68	51	0	0	0	63.2	44	26	26	7	37	2	12	5	265	2	7.21	5.23	1.38	0.99	19.2	14.0	1.27	.220	3.68	84	4.79	107	6.22	-2.4
14	Kirk Rueter K. Rueter	8	0	1993	MON	1.000	.000	14	14	2.73	31	1	0	0	85.2	85	26	33	5	18	0	0	1	341	0	3.26	1.89	1.72	0.53	9.1	5.3	1.20	.279	3.47	68	3.64	92	8.93	3.1
15	Grant Jackson G. Jackson	8	0	1973	BAL	1.000	.000	45	0	1.90	47	0	0	9	80.1	54	17	18	5	24	0	33	4	305	1	5.27	2.69	1.96	0.56	15.4	7.9	0.97	.214	2.02	51	3.09	84	6.05	5.3
16	Ted Wilks T. Wilks	8	0	1946	SLN	1.000	.000	40	4	3.41	40	0	0	1	95.0	88	36	41	13	38	2	18		404	0	3.79	3.60	1.05	1.23	9.9	9.4	1.33	.241	3.88	100	4.58	132	8.34	-11.7
17	Caleb Thielbar C. Thielbar	7	0	2021	MIN	1.000	.000	59	0	3.23	77	0	0	0	64.0	55	23	24	8	20	3	14	1	266	3	10.83	2.81	3.85	1.13	28.9	7.5	1.17	.297	3.38	76	3.46	82	7.73	5.5
18	Max Fried M. Fried	7	0	2020	ATL	1.000	.000	11	11	2.25	50	0	0	0	56.0	42	14	14	2	19	4	0	0	224	1	8.04	3.05	2.63	0.32	22.3	8.5	1.09	.268	2.25	49	3.09	70	6.75	8.2
19	Trevor Gott T. Gott	7	0	2019	SFG	1.000	.000	50	0	4.44	57	0	0	1	52.2	41	26	26	4	17	2	6	0	214	1	9.74	2.91	3.35	0.68	26.6	7.9	1.10	.276	4.44	106	3.11	74	7.01	6.6
20	Corbin Burnes C. Burnes	7	0	2018	MIL	1.000	.000	30	0	2.61	35	0	0	1	38.0	27	11	11	4	11	3	6	2	152	2	8.29	2.61	3.18	0.95	23.0	7.2	1.00	.232	2.61	65	3.79	93	6.39	1.2
21	AJ Ramos	7	0	2014	MIA	1.000	.000	68	0	2.11	73	0	0	0	64.0	36	15	16	1	43	3	12	7	270	7	10.27	6.05	1.70	0.14	27.0	15.9	1.23	.233	2.25	59	3.21	90	5.06	2.6
22	Joe Nathan J. Nathan	7	0	2006	MIN	1.000	.000	64	0	1.58	95	0	0	36	68.1	38	12	12	3	16	1	61	4	262	3	12.51	2.11	5.94	0.40	36.3	6.1	0.79	.238	1.58	35	1.68	38	5.00	21.1
23	Pete Smith P. Smith	7	0	1992	ATL	1.000	.000	12	11	2.05	43	2	1	0	79.0	63	18	19	3	28	0	0	2	323	2	4.90	3.19	1.54	0.34	13.3	8.7	1.15	.241	2.16	57	3.24	92	7.18	2.6
24	Tim Burke T. Burke	7	0	1987	MON	1.000	.000	55	0	1.19	58	0	0	18	91.0	64	12	18	3	17	0	30	6	354	2	5.74	1.68	3.41	0.30	16.4	4.8	0.89	.221	1.78	29	2.57	64	6.33	14.9
25	Pascual Perez P. Perez	7	0	1987	MON	1.000	.000	10	10	2.30	58	2	0	0	70.1	52	18	21	5	16	1	0	1	273	1	7.42	2.05	3.63	0.64	21.2	5.9	0.97	.244	2.69	56	2.86	71	6.65	9.3