Between the 2021 and 2023 seasons, Nathan Eovaldi had the most wins in the postseason, with 7 wins.

Interpreted as:

MLB most playoff wins by a player 2021 to 2023

	NAME	W	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	H/9
1	Nathan Eovaldi N. Eovaldi	7	2	.778	11	10	3.61	66	0	0	0	57.1	50	23	23	5	15	1	0	3	240	0	10.36	2.35	4.40	0.78	27.5	6.3	1.13	.294	3.61	7.85
2	Aaron Nola A. Nola	5	3	.625	9	9	3.70	50	0	0	0	48.2	47	20	21	6	9	2	0	0	201	0	9.25	1.66	5.56	1.11	24.9	4.5	1.15	.306	3.88	8.69
3	Zack Wheeler Z. Wheeler	4	3	.571	11	10	2.42	68	0	0	0	63.1	36	17	19	5	10	4	0	0	238	1	9.66	1.42	6.80	0.71	28.6	4.2	0.73	.205	2.70	5.12
4	Framber Valdez F. Valdez	4	4	.500	12	12	5.24	66	0	0	0	56.2	61	33	37	11	22	4	0	0	249	0	10.48	3.49	3.00	1.75	26.5	8.8	1.46	.342	5.88	9.69
5	Cristian Javier C. Javier	4	2	.667	12	5	2.62	47	0	0	0	34.1	17	10	10	6	18	2	0	0	139	1	12.32	4.72	2.61	1.57	33.8	12.9	1.02	.167	2.62	4.46
6	Merrill Kelly M. Kelly	3	1	.750	4	4	2.25	28	0	0	0	24.0	12	6	6	4	8	0	0	0	91	0	10.50	3.00	3.50	1.50	30.8	8.8	0.83	.157	2.25	4.50
7	Jordan Montgomery J. Montgomery	3	1	.750	7	5	2.67	20	0	0	0	33.2	39	10	11	3	8	0	0	2	146	1	5.35	2.14	2.50	0.80	13.7	5.5	1.40	.313	2.94	10.43
8	Ranger Suárez R. Suárez	3	1	.750	9	7	1.62	32	0	0	1	33.1	22	6	7	2	8	1	1	0	132	0	8.64	2.16	4.00	0.54	24.2	6.1	0.90	.225	1.89	5.94
9	Justin Verlander J. Verlander	3	1	.750	7	7	4.46	39	0	0	0	38.1	39	19	19	6	14	2	0	0	166	0	9.16	3.29	2.79	1.41	23.5	8.4	1.38	.314	4.46	9.16
10	Tyler Matzek T. Matzek	3	0	1.000	13	0	1.72	24	0	0	0	15.2	10	3	3	0	4	0	1	1	60	0	13.79	2.30	6.00	0.00	40.0	6.7	0.89	.313	1.72	5.74
11	Ryne Stanek R. Stanek	3	0	1.000	21	0	3.00	18	0	0	0	18.0	9	6	6	3	3	1	6	0	64	0	9.00	1.50	6.00	1.50	28.1	4.7	0.67	.154	3.00	4.50
12	José Urquidy J. Urquidy	3	1	.750	7	4	5.66	20	0	0	0	20.2	23	13	14	7	5	0	1	0	90	2	8.71	2.18	4.00	3.05	22.2	5.6	1.35	.276	6.10	10.02
13	Pablo López P. López	2	0	1.000	2	2	0.71	10	0	0	0	12.2	11	1	1	0	3	1	0	0	52	1	7.11	2.13	3.33	0.00	19.2	5.8	1.11	.289	0.71	7.82
14	Zac Gallen Z. Gallen	2	3	.400	6	6	4.54	24	0	0	0	33.2	31	17	17	6	14	1	0	0	141	2	6.42	3.74	1.71	1.60	17.0	9.9	1.34	.260	4.54	8.29
15	Yu Darvish Y. Darvish	2	1	.667	4	4	2.88	23	0	0	0	25.0	20	8	8	7	6	3	0	0	101	1	8.28	2.16	3.83	2.52	22.8	5.9	1.04	.210	2.88	7.20
16	Seranthony Domínguez S. Domínguez	2	0	1.000	15	0	1.13	25	0	0	1	16.0	13	2	3	0	4	0	2	0	66	4	14.06	2.25	6.25	0.00	37.9	6.1	1.06	.351	1.69	7.31
17	Brad Hand B. Hand	2	0	1.000	8	0	5.40	6	0	0	0	6.2	7	4	4	2	2	1	2	0	30	0	8.10	2.70	3.00	2.70	20.0	6.7	1.35	.263	5.40	9.45
18	Héctor Neris H. Neris	2	0	1.000	15	0	4.40	17	0	0	0	14.1	8	7	7	4	5	1	0	0	57	0	10.67	3.14	3.40	2.51	29.8	8.8	0.91	.133	4.40	5.02
19	Blake Snell B. Snell	2	0	1.000	3	3	4.61	17	0	0	0	13.2	14	7	7	1	9	0	0	0	63	1	11.20	5.93	1.89	0.66	27.0	14.3	1.68	.361	4.61	9.22
20	Gerrit Cole G. Cole	2	2	.500	4	4	3.98	26	0	0	0	20.1	19	9	11	5	6	2	0	0	89	0	11.51	2.66	4.33	2.21	29.2	6.7	1.23	.280	4.87	8.41
21	Max Fried M. Fried	2	3	.400	7	7	5.14	34	0	0	0	35.0	44	20	22	4	8	1	0	0	156	3	8.74	2.06	4.25	1.03	21.8	5.1	1.49	.367	5.66	11.31
22	Kenley Jansen K. Jansen	2	0	1.000	10	0	1.00	16	0	0	2	9.0	4	1	1	1	1	0	8	1	32	0	16.00	1.00	16.00	1.00	50.0	3.1	0.56	.214	1.00	4.00
23	A.J. Minter	2	1	.667	13	0	3.71	23	0	0	0	17.0	12	7	7	0	6	2	0	2	71	0	12.18	3.18	3.83	0.00	32.4	8.5	1.06	.300	3.71	6.35
24	Will Smith W. Smith	2	0	1.000	16	0	2.51	12	0	0	6	14.1	8	4	4	1	6	1	11	0	55	0	7.53	3.77	2.00	0.63	21.8	10.9	0.98	.200	2.51	5.02
25	Julio Urías J. Urías	2	1	.667	5	3	5.40	21	0	0	0	20.0	21	12	12	5	3	0	0	1	84	1	9.45	1.35	7.00	2.25	25.0	3.6	1.20	.291	5.40	9.45