Zack Wheeler had the most innings pitched per start with 27+ starts in 2021, with 6.67.

	NAME	IP/GS	GS	IP	SEASON	TM	G	W	L	W%	ERA	SO	CG	SHO	SV	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	Zack Wheeler Z. Wheeler	6.67	32	213.1	2021	PHI	32	14	10	.583	2.78	247	3	2	0	169	66	72	16	46	8	0	1	849	6	10.42	1.94	5.37	0.68	29.1	5.4	1.01	.288	3.04	66	2.58	60	7.13	40.7
2	Adam Wainwright A. Wainwright	6.45	32	206.1	2021	STL	32	17	7	.708	3.05	174	3	1	0	168	70	72	21	50	9	0	3	828	4	7.59	2.18	3.48	0.92	21.0	6.0	1.06	.256	3.14	75	3.66	88	7.33	11.5
3	Walker Buehler W. Buehler	6.29	33	207.2	2021	LAD	33	16	4	.800	2.47	212	0	0	0	149	57	61	19	52	6	0	2	815	5	9.19	2.25	4.08	0.82	26.0	6.4	0.97	.247	2.64	61	3.15	74	6.46	26
4	Sandy Alcantara S. Alcantara	6.23	33	205.2	2021	MIA	33	9	15	.375	3.19	201	1	0	0	171	73	85	21	50	10	0	2	837	6	8.80	2.19	4.02	0.92	24.0	6.0	1.07	.270	3.72	76	3.41	82	7.48	17.2
5	Kyle Gibson K. Gibson	6.07	30	182.0	2021	TOT	31	10	9	.526	3.71	155	0	0	0	158	75	78	17	64	8	0	2	754	2	7.66	3.16	2.42	0.84	20.6	8.5	1.22	.276	3.86	86	3.86	88	7.81	10.3
6	Gerrit Cole G. Cole	6.04	30	181.1	2021	NYY	30	16	8	.667	3.23	243	2	1	0	151	65	69	24	41	2	0	0	726	5	12.06	2.03	5.93	1.19	33.5	5.6	1.06	.305	3.42	76	2.91	67	7.49	28.1
7	Robbie Ray R. Ray	6.04	32	193.1	2021	TOR	32	13	7	.650	2.84	248	0	0	0	150	61	62	33	52	4	0	0	773	5	11.54	2.42	4.77	1.54	32.1	6.7	1.04	.268	2.89	63	3.68	87	6.98	11.8
8	José Berríos J. Berríos	6	32	192.0	2021	TOT	32	12	9	.571	3.52	204	1	0	0	159	75	83	22	45	15	0	0	781	3	9.56	2.11	4.53	1.03	26.1	5.8	1.06	.277	3.89	81	3.46	82	7.45	16.5
9	Jordan Lyles J. Lyles	6	30	180.0	2021	TEX	32	10	13	.435	5.15	146	0	0	0	194	103	104	38	56	7	1	0	769	9	7.30	2.80	2.61	1.90	19.0	7.3	1.39	.299	5.20	117	5.33	121	9.70	-17.8
10	Max Scherzer M. Scherzer	5.98	30	179.1	2021	TOT	30	15	4	.789	2.46	236	1	0	0	119	49	53	23	36	10	0	0	693	2	11.84	1.81	6.56	1.15	34.1	5.2	0.86	.247	2.66	59	2.97	69	5.97	26
11	Brandon Woodruff B. Woodruff	5.98	30	179.1	2021	MIL	30	9	10	.474	2.56	211	0	0	0	130	51	54	18	43	7	0	0	708	2	10.59	2.16	4.91	0.90	29.8	6.1	0.96	.261	2.71	61	2.95	69	6.52	26.4
12	Corbin Burnes C. Burnes	5.96	28	167.0	2021	MIL	28	11	5	.688	2.43	234	0	0	0	123	45	47	7	34	6	0	0	657	5	12.61	1.83	6.88	0.38	35.6	5.2	0.94	.309	2.53	58	1.62	38	6.63	48.9
13	Max Fried M. Fried	5.92	28	165.2	2021	ATL	28	14	7	.667	3.04	158	2	2	0	139	56	61	15	41	7	0	0	667	7	8.58	2.23	3.85	0.81	23.7	6.1	1.09	.278	3.31	72	3.30	79	7.55	16.6
14	Zack Greinke Z. Greinke	5.9	29	171.0	2021	HOU	30	11	6	.647	4.16	120	1	0	0	164	79	82	30	36	2	0	0	697	3	6.32	1.89	3.33	1.58	17.2	5.2	1.17	.263	4.32	97	4.71	111	8.63	-9.1
15	Merrill Kelly M. Kelly	5.85	27	158.0	2021	ARI	27	7	11	.389	4.44	130	0	0	0	163	78	82	21	41	4	0	3	667	2	7.41	2.34	3.17	1.20	19.5	6.1	1.29	.301	4.67	106	4.10	100	9.28	0
16	Joe Musgrove J. Musgrove	5.85	31	181.1	2021	SDP	32	11	9	.550	3.18	203	2	2	0	142	64	68	22	54	18	1	3	748	3	10.08	2.68	3.76	1.09	27.1	7.2	1.08	.266	3.38	81	3.69	88	7.05	10.2
17	Frankie Montas Jr. F. Montas Jr.	5.84	32	187.0	2021	OAK	32	13	9	.591	3.37	207	0	0	0	164	70	79	20	57	7	0	1	778	11	9.96	2.74	3.63	0.96	26.6	7.3	1.18	.296	3.80	82	3.37	81	7.89	16.5
18	Chris Bassitt C. Bassitt	5.83	27	157.1	2021	OAK	27	12	4	.750	3.15	159	1	1	0	127	55	55	15	39	11	0	1	637	5	9.10	2.23	4.08	0.86	25.0	6.1	1.06	.271	3.15	77	3.33	80	7.26	14.5
19	Wade Miley W. Miley	5.82	28	163.0	2021	CIN	28	12	7	.632	3.37	125	1	1	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
20	Kevin Gausman K. Gausman	5.82	33	192.0	2021	SFG	33	14	6	.700	2.81	227	0	0	0	150	60	66	20	50	4	0	1	775	7	10.64	2.34	4.54	0.94	29.3	6.5	1.04	.274	3.09	70	3.00	74	7.03	23.5
21	Julio Urías J. Urías	5.8	32	185.2	2021	LAD	32	20	3	.870	2.96	195	0	0	0	151	61	67	19	38	7	0	3	745	2	9.45	1.84	5.13	0.92	26.2	5.1	1.02	.272	3.25	73	3.12	73	7.32	23.8
22	Lance McCullers Jr. L. McCullers Jr.	5.8	28	162.1	2021	HOU	28	13	5	.722	3.16	185	0	0	0	122	57	59	13	76	10	0	0	684	7	10.26	4.21	2.43	0.72	27.0	11.1	1.22	.273	3.27	74	3.51	83	6.76	13
23	Chris Flexen C. Flexen	5.8	31	179.2	2021	SEA	31	14	6	.700	3.61	125	0	0	0	185	72	74	19	40	4	0	0	741	2	6.26	2.00	3.13	0.95	16.9	5.4	1.25	.300	3.71	87	3.88	94	9.27	5.3
24	Lucas Giolito L. Giolito	5.76	31	178.2	2021	CWS	31	11	9	.550	3.53	201	1	0	0	145	70	74	27	52	2	0	1	720	12	10.13	2.62	3.87	1.36	27.9	7.2	1.10	.269	3.73	81	3.78	85	7.30	13
25	Nathan Eovaldi N. Eovaldi	5.7	32	182.1	2021	BOS	32	11	9	.550	3.75	195	0	0	0	182	76	81	15	35	7	0	2	764	6	9.63	1.73	5.57	0.74	25.5	4.6	1.19	.326	4.00	82	2.78	64	8.98	30.9