Tyler Mahle won the most games for the Reds in 2021, with 13 wins.

	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	Tyler Mahle T. Mahle	13	2021	CIN	6	.684	33	33	3.75	210	0	0	0	180.0	158	75	78	24	64	10	0	0	759	4	10.50	3.20	3.28	1.20	27.7	8.4	1.23	.297	3.90	85	3.80	85	7.90	12.9
2	Wade Miley W. Miley	12	2021	CIN	7	.632	28	28	3.37	125	1	1	0	163.0	166	61	64	17	50	3	0	0	690	2	6.90	2.76	2.50	0.94	18.1	7.2	1.33	.301	3.53	76	3.96	89	9.17	8.8
3	Vladimir Gutierrez V. Gutierrez	9	2021	CIN	6	.600	22	22	4.74	88	0	0	0	114.0	115	60	61	20	46	4	0	0	496	3	6.95	3.63	1.91	1.58	17.7	9.3	1.41	.281	4.82	108	5.21	117	9.08	-9
4	Luis Castillo L. Castillo	8	2021	CIN	16	.333	33	33	3.98	192	0	0	0	187.2	181	83	94	19	75	7	0	4	803	1	9.21	3.60	2.56	0.91	23.9	9.3	1.36	.318	4.51	90	3.74	84	8.68	14.5
5	Sonny Gray S. Gray	7	2021	CIN	9	.438	26	26	4.19	155	0	0	0	135.1	115	63	67	19	50	8	0	1	575	9	10.31	3.33	3.10	1.26	27.0	8.7	1.22	.280	4.46	95	3.98	89	7.65	7
6	Ryan Hendrix R. Hendrix	5	2021	CIN	1	.833	36	0	5.97	35	0	0	0	31.2	33	21	23	8	16	1	9	2	142	6	9.95	4.55	2.19	2.27	24.6	11.3	1.55	.305	6.54	135	5.85	131	9.38	-4.6
7	Lucas Sims L. Sims	5	2021	CIN	3	.625	47	0	4.40	76	0	0	7	47.0	34	23	26	6	18	4	13	3	195	2	14.55	3.45	4.22	1.15	39.0	9.2	1.11	.308	4.98	100	2.99	67	6.51	7.4
8	Sean Doolittle S. Doolittle	3	2021	CIN	1	.750	45	0	4.46	41	0	0	1	38.1	40	19	21	6	18	1	11	3	173	0	9.63	4.23	2.28	1.41	23.7	10.4	1.51	.318	4.93	101	4.54	102	9.39	-0.3
9	Jeff Hoffman J. Hoffman	3	2021	CIN	5	.375	31	11	4.56	79	0	0	0	73.0	70	37	41	12	45	5	7	2	335	9	9.74	5.55	1.76	1.48	23.6	13.4	1.58	.299	5.05	104	5.19	117	8.63	-5.5
10	Art Warren A. Warren	3	2021	CIN	0	1.000	26	0	1.29	34	0	0	0	21.0	11	3	3	1	8	1	6	1	82	0	14.57	3.43	4.25	0.43	41.5	9.8	0.90	.263	1.29	29	1.83	41	4.71	5.9
11	Tejay Antone T. Antone	2	2021	CIN	0	1.000	23	0	2.14	42	0	0	3	33.2	17	8	8	3	13	3	4	0	128	1	11.23	3.48	3.23	0.80	32.8	10.2	0.89	.209	2.14	49	3.25	73	4.54	4.3
12	Luis Cessa L. Cessa	2	2021	CIN	1	.667	24	0	2.05	23	0	0	0	26.1	24	6	7	3	2	0	2	0	100	1	7.86	0.68	11.50	1.03	23.0	2.0	0.99	.292	2.39	47	3.12	70	8.20	3.8
13	Heath Hembree H. Hembree	2	2021	CIN	7	.222	45	0	6.38	68	0	0	8	42.1	32	30	33	10	19	2	16	0	179	1	14.46	4.04	3.58	2.13	38.0	10.6	1.20	.275	7.02	145	4.51	101	6.80	-0.2
14	Josh Osich J. Osich	2	2021	CIN	0	1.000	17	0	5.02	9	0	0	1	14.1	15	8	9	4	5	0	3	0	60	0	5.65	3.14	1.80	2.51	15.0	8.3	1.40	.262	5.65	114	6.58	148	9.42	-3.2
15	Reiver Sanmartin R. Sanmartin	2	2021	CIN	0	1.000	2	2	1.54	11	0	0	0	11.2	12	2	2	0	2	0	0	0	47	1	8.49	1.54	5.50	0.00	23.4	4.3	1.20	.353	1.54	35	1.79	40	9.26	3.3
16	Brad Brach B. Brach	1	2021	CIN	2	.333	35	0	6.30	33	0	0	1	30.0	30	21	26	5	18	1	5	2	139	2	9.90	5.40	1.83	1.50	23.7	12.9	1.60	.305	7.80	143	5.03	113	9.00	-1.8
17	Mychal Givens M. Givens	1	2021	CIN	1	.500	23	0	4.22	20	0	0	8	21.1	18	10	11	2	13	0	13	2	92	0	8.44	5.48	1.54	0.84	21.7	14.1	1.45	.281	4.64	96	4.33	97	7.59	0.3
18	Michael Lorenzen M. Lorenzen	1	2021	CIN	2	.333	27	0	5.59	21	0	0	4	29.0	26	18	18	2	14	1	5	0	125	5	6.52	4.34	1.50	0.62	16.8	11.2	1.38	.276	5.59	127	4.16	93	8.07	0.9
19	Cionel Pérez C. Pérez	1	2021	CIN	2	.333	25	0	6.38	25	0	0	0	24.0	21	17	21	5	20	0	5	1	111	1	9.38	7.50	1.25	1.88	22.5	18.0	1.71	.262	7.88	145	6.29	141	7.88	-4.6
20	Tony Santillan T. Santillan	1	2021	CIN	3	.250	26	4	2.91	56	0	0	0	43.1	34	14	15	7	21	7	5	0	190	1	11.63	4.36	2.67	1.45	29.5	11.1	1.27	.273	3.12	66	4.62	104	7.06	-0.7