Mariano Rivera played the most seasons with a WHIP of 1.00 or lower, with 11 seasons.

Interpreted as:

most 1.00 or lower whip seasons by a player

	NAME	SEAS	WHIP	G	W	L	W%	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%	BABIP	RA	ERA-	FIP	FIP-	H/9	PRAA
1	Mariano Rivera M. Rivera	11	0.89	641	43	39	.524	0	1.89	703	0	0	370	723.1	504	152	168	32	143	27	539	22	2,800	8	8.75	1.78	4.92	0.40	25.1	5.1	.249	2.09	42	2.42	54	6.27	165.7
2	Walter Johnson W. Johnson	9	0.93	402	229	124	.649	316	1.53	1,944	278	71	19	2992.0	2,216	507	732	21	562	108	81		11,369	87	5.85	1.69	3.46	0.06	17.1	4.9	.251	2.20	56	1.88	67	6.67	309.4
3	Jacob deGrom J. deGrom	8	0.89	168	65	41	.613	168	2.31	1,311	2	1	0	1039.1	723	267	291	95	206	18	0	6	4,005	18	11.35	1.78	6.36	0.82	32.7	5.1	.264	2.52	59	2.47	60	6.26	192.6
4	Clayton Kershaw C. Kershaw	8	0.89	206	122	37	.767	206	2.04	1,593	22	12	0	1409.0	1,010	320	359	99	251	18	0	6	5,396	42	10.18	1.60	6.35	0.63	29.5	4.7	.265	2.29	54	2.32	60	6.45	247.5
5	Kenley Jansen K. Jansen	8	0.85	487	26	18	.591	0	2.10	683	0	0	248	488.2	296	114	121	48	117	16	369	8	1,885	9	12.58	2.15	5.84	0.88	36.2	6.2	.243	2.23	54	2.41	60	5.45	87
6	Joe Nathan J. Nathan	8	0.91	416	24	12	.667	0	1.78	517	0	0	253	415.2	254	82	87	25	123	8	366	16	1,617	20	11.19	2.66	4.20	0.54	32.0	7.6	.243	1.88	41	2.31	55	5.50	91.1
7	Billy Wagner B. Wagner	8	0.86	451	24	13	.649	0	1.88	619	0	0	241	478.1	284	100	117	40	126	14	389	17	1,842	20	11.65	2.37	4.91	0.75	33.6	6.8	.234	2.20	44	2.42	56	5.34	99.9
8	Josh Hader J. Hader	7	0.87	351	30	23	.566	0	2.50	663	0	0	158	406.0	207	113	123	54	147	17	224	4	1,569	11	14.70	3.26	4.51	1.20	42.3	9.4	.222	2.73	60	2.84	67	4.59	62.2
9	Max Scherzer M. Scherzer	7	0.92	216	115	44	.723	216	2.66	1,777	10	4	0	1417.1	996	419	444	157	312	59	0	10	5,541	29	11.28	1.98	5.70	1.00	32.1	5.6	.259	2.82	65	2.84	69	6.32	196.4
10	Darren O'Day D. O'Day	7	0.92	372	33	10	.767	0	1.90	356	0	0	12	346.2	239	73	79	30	80	30	80	10	1,366	1	9.24	2.08	4.45	0.78	26.1	5.9	.240	2.05	46	3.12	75	6.20	39.7
11	Koji Uehara K. Uehara	7	0.80	375	17	18	.486	0	2.26	474	0	0	93	371.0	241	93	99	46	54	4	197	5	1,405	9	11.50	1.31	8.78	1.12	33.7	3.8	.236	2.40	53	2.61	64	5.85	59.2
12	Trevor Hoffman T. Hoffman	7	0.93	445	25	24	.510	0	2.17	506	0	0	302	472.1	325	114	128	33	113	5	383	17	1,843	24	9.64	2.15	4.48	0.63	27.5	6.1	.246	2.44	53	2.64	61	6.19	90.1
13	Pedro Martinez P. Martinez	7	0.90	172	100	34	.746	169	2.17	1,520	32	10	0	1212.2	839	293	331	79	249	57	2	10	4,716	21	11.28	1.85	6.10	0.59	32.2	5.3	.270	2.46	49	2.16	50	6.23	303.2
14	Hoyt Wilhelm H. Wilhelm	7	0.92	376	40	38	.513	3	2.05	528	0	0	104	684.2	469	156	186	43	160	15	258	20	2,651	27	6.94	2.10	3.30	0.57	19.9	6.0	.224	2.44	61	2.55	74	6.17	68.2
15	Roberto Osuna R. Osuna	6	0.90	314	14	18	.438	0	2.74	348	0	0	155	315.0	230	96	101	28	55	13	247	6	1,227	17	9.94	1.57	6.33	0.80	28.4	4.5	.258	2.89	64	2.75	64	6.57	54.1
16	Craig Kimbrel C. Kimbrel	6	0.83	387	21	13	.618	0	1.69	631	0	0	240	382.1	191	72	79	28	128	16	321	3	1,469	34	14.85	3.01	4.93	0.66	43.0	8.7	.245	1.86	41	1.90	47	4.50	89.7
17	Jake McGee J. McGee	6	0.88	275	17	9	.654	0	2.24	308	0	0	56	249.0	168	62	71	17	51	6	99	7	971	5	11.13	1.84	6.04	0.61	31.7	5.3	.256	2.57	57	2.23	56	6.07	48.8
18	Dennis Eckersley D. Eckersley	6	0.85	335	35	16	.686	25	2.28	495	6	2	220	529.0	392	134	143	43	57	7	284	16	2,019	1	8.42	0.97	8.68	0.73	24.5	2.8	.246	2.43	60	2.30	60	6.67	90.9
19	Addie Joss A. Joss	6	0.93	208	118	67	.638	187	1.70	633	166	36	5	1664.1	1,321	314	485	11	225	32	19		6,295	20	3.42	1.22	2.81	0.06	10.1	3.6	.243	2.62	66	2.12	85	7.14	63.6
20	Cy Young C. Young	6	0.94	243	147	80	.648	220	1.80	1,041	206	35	7	2056.0	1,709	412	599	25	221	36	22		7,802	27	4.56	0.97	4.71	0.11	13.3	2.8	.260	2.62	64	2.02	72	7.48	178.5
21	Raisel Iglesias R. Iglesias	5	0.91	290	23	22	.511	0	2.56	353	0	0	122	291.2	204	83	100	29	60	10	224	7	1,135	6	10.89	1.85	5.88	0.89	31.1	5.3	.256	3.09	60	2.74	66	6.29	45.4
22	Shawn Armstrong S. Armstrong	5	0.84	146	7	4	.636	8	1.87	168	0	0	10	163.2	99	34	43	10	39	14	37	1	635	5	9.24	2.14	4.31	0.55	26.5	6.1	.220	2.36	45	2.89	68	5.44	24.7
23	Pedro Baez P. Baez	5	0.96	186	10	4	.714	0	3.00	188	0	0	3	189.0	123	63	73	23	58	6	32	2	748	4	8.95	2.76	3.24	1.10	25.1	7.8	.211	3.48	74	3.77	91	5.86	8.2
24	Yimi García Y. García	5	0.90	184	10	9	.526	1	3.15	211	0	0	7	183.0	122	64	69	31	42	10	54	6	721	3	10.38	2.07	5.02	1.52	29.3	5.8	.213	3.39	79	3.91	95	6.00	3.8
25	Sean Doolittle S. Doolittle	5	0.79	233	12	12	.500	0	2.58	277	0	0	73	233.1	147	67	69	17	37	4	120	4	879	6	10.68	1.43	7.49	0.66	31.5	4.2	.239	2.66	66	2.21	55	5.67	46.3