Jacob deGrom has the lowest WHIP with more than 85.0 innings pitched and more than 5 starts in a season, with a WHIP of 0.55 in 2021.

Interpreted as:

best whip by a player single season >85 ip >5 gs

	NAME	WHIP	IP	GS	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%	BABIP	RA	ERA-	FIP	FIP-	H/9	PRAA
1	Jacob deGrom J. deGrom	0.55	92.0	15	2021	NYM	15	7	2	.778	1.08	146	1	1	0	40	11	14	6	11	1	0	0	324	0	14.28	1.08	13.27	0.59	45.1	3.4	.213	1.37	27	1.23	29	3.91	30.6
2	Clayton Kershaw C. Kershaw	0.72	149.0	21	2016	LAD	21	12	4	.750	1.69	172	3	3	0	97	28	31	8	11	2	0	1	544	5	10.39	0.66	15.64	0.48	31.6	2.0	.254	1.87	42	1.79	44	5.86	37.9
3	Pedro Martinez P. Martinez	0.74	217.0	29	2000	BOS	29	18	6	.750	1.74	284	7	4	0	128	42	44	17	32	14	0	0	817	1	11.78	1.33	8.88	0.71	34.8	3.9	.236	1.82	35	2.16	47	5.31	61.5
4	Guy Hecker G. Hecker	0.77	104.0	11	1882	LOU	13	6	6	.500	1.30	33	10	0	0	75	15	49	0	5		1		403	7	2.86	0.43	6.60	0.00	8.2	1.2		4.24	49	2.27	82	6.49	5.1
5	Walter Johnson W. Johnson	0.78	346.0	36	1913	WSH	48	36	7	.837	1.14	243	29	11	2	232	44	56	9	38	9	10		1,271	2	6.32	0.99	6.39	0.23	19.1	3.0	.229	1.46	39	1.90	63	6.03	42.3
6	Tyler Holton T. Holton	0.78	94.1	9	2024	DET	66	7	2	.778	2.19	77	0	0	8	57	23	25	7	17	4	14	1	354	0	7.35	1.62	4.53	0.67	21.8	4.8	.201	2.39	55	3.16	78	5.44	9.3
7	Tim Keefe T. Keefe	0.80	105.0	12	1880	TRO	12	6	6	.500	0.86	39	12	0	0	68	10	27	0	16		0		397	1	3.34	1.37	2.44	0.00	9.8	4.0		2.31	35	2.25	91	5.83	3.6
8	Justin Verlander J. Verlander	0.80	223.0	34	2019	HOU	34	21	6	.778	2.58	300	2	1	0	137	64	66	36	42	6	0	0	847	4	12.11	1.70	7.14	1.45	35.4	5.0	.218	2.66	57	3.26	72	5.53	31.5
9	Addie Joss A. Joss	0.81	325.0	35	1908	CLE	42	24	11	.686	1.16	130	29	9	2	232	42	77	2	30	2	6		1,209	6	3.60	0.83	4.33	0.06	10.8	2.5	.220	2.13	49	1.68	76	6.42	19.3
10	Greg Maddux G. Maddux	0.81	209.2	28	1995	ATL	28	19	2	.905	1.63	181	10	3	0	147	38	39	8	23	4	0	3	785	1	7.77	0.99	7.87	0.34	23.1	2.9	.244	1.67	39	2.25	52	6.31	46.9
11	Charlie Sweeney C. Sweeney	0.82	492.0	56	1884	TOT	60	41	15	.732	1.70	337	53	6	1	360	93	182	6	42		4		1,909	21	6.16	0.77	8.02	0.11	17.7	2.2		3.33	58	2.32	81	6.59	26.9
12	Ed Walsh E. Walsh	0.82	369.2	36	1910	CWS	45	18	20	.474	1.27	258	33	7	5	242	52	87	5	61	4	7		1,359	6	6.28	1.49	4.23	0.12	19.0	4.5	.230	2.12	52	1.63	66	5.89	34.8
13	Ferdie Schupp F. Schupp	0.83	140.1	11	1916	NYG	30	9	3	.750	0.90	86	8	4	1	79	14	22	1	37	5	17		525	2	5.52	2.37	2.32	0.06	16.4	7.0	.197	1.41	36	2.08	84	5.07	6.1
14	Christy Mathewson C. Mathewson	0.83	390.2	44	1908	NYG	56	37	11	.771	1.43	259	34	11	5	281	62	85	5	42	3	9		1,469	2	5.97	0.97	6.17	0.12	17.6	2.9	.238	1.96	61	1.29	52	6.47	52.4
15	Christy Mathewson C. Mathewson	0.83	275.1	33	1909	NYG	37	25	6	.806	1.14	149	26	8	2	192	35	57	2	36	0	4		998	4	4.87	1.18	4.14	0.07	14.9	3.6	.234	1.86	44	1.62	61	6.28	31.7
16	Justin Verlander J. Verlander	0.83	175.0	28	2022	HOU	28	18	4	.818	1.75	185	0	0	0	116	34	43	12	29	6	0	0	666	3	9.51	1.49	6.38	0.62	27.8	4.4	.240	2.21	46	2.48	64	5.97	27.7
17	Elmer Steele E. Steele	0.83	118.0	13	1908	BOS	16	5	7	.417	1.83	37	9	1	0	85	24	34	1	13	3	2		423	0	2.82	0.99	2.85	0.08	8.7	3.1	.228	2.59	75	1.99	87	6.48	4
18	George Bradley G. Bradley	0.84	196.0	20	1880	PRO	28	13	8	.619	1.38	54	16	4	2	158	30	66	2	6		7		757	7	2.48	0.28	9.00	0.09	7.1	0.8		3.03	60	2.21	96	7.26	0.6
19	Mordecai Brown M. Brown	0.84	312.1	31	1908	CHC	44	29	9	.763	1.47	123	27	9	5	214	51	64	1	49	5	12		1,153	6	3.54	1.41	2.51	0.03	10.7	4.2	.218	1.84	63	1.87	75	6.17	21.5
20	Grover Alexander G. Alexander	0.84	376.1	42	1915	PHN	49	31	10	.756	1.22	241	36	12	3	253	51	86	3	64	10	7		1,435	2	5.76	1.53	3.77	0.07	16.8	4.5	.224	2.06	43	1.82	63	6.05	44.1
21	Dave McNally D. McNally	0.84	273.0	35	1968	BAL	35	22	10	.688	1.95	202	18	5	0	175	59	67	24	55	10	0	1	1,038	5	6.66	1.81	3.67	0.79	19.5	5.3	.202	2.21	67	2.76	90	5.77	9.5
22	Zack Greinke Z. Greinke	0.84	222.2	32	2015	LAD	32	19	3	.864	1.66	200	1	0	0	148	41	43	14	40	5	0	1	843	7	8.08	1.62	5.00	0.57	23.7	4.7	.229	1.74	44	2.75	73	5.98	26.2
23	Henry Boyle H. Boyle	0.85	150.0	16	1884	SLU	19	15	3	.833	1.74	88	16	2	1	118	29	63	3	10		3		595	3	5.28	0.60	8.80	0.18	14.8	1.7		3.78	59	2.56	100	7.08	-1.1
24	Bob Gibson B. Gibson	0.85	304.2	34	1968	STL	34	22	9	.710	1.12	268	28	13	0	198	38	49	11	62	7	0	6	1,161	4	7.92	1.83	4.32	0.32	23.1	5.3	.230	1.45	38	1.77	63	5.85	34.8
25	Nathan Eovaldi N. Eovaldi	0.85	130.0	22	2025	TEX	22	11	3	.786	1.73	129	1	1	0	90	25	28	10	21	7	0	1	496	6	8.93	1.45	6.14	0.69	26.0	4.2	.243	1.94	42	2.79	66	6.23	20.8