lowest whip in a season by a relief pitcher with at least 30 ip; maximum 0.99 whip

George Winter has the lowest WHIP by a relief pitcher with 30.0+ innings pitched in a season, with a WHIP of 0.50 in 1907.

	NAME	WHIP	IP	SEASON	TM	G	W	L	W%	GS	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	H/9
1	George Winter G. Winter	0.50	35.2	1907	BSA	8	2	1	.667	0		15	0	0	1	13		2	0	5	1	8			0	3.79	1.26	3.00	0.00				0.50	3.28
2	Koji Uehara K. Uehara	0.57	74.1	2013	BOS	73	4	1	.800	0	1.09	101	0	0	21	33	9	10	5	9	1	40	2	265	1	12.23	1.09	11.22	0.61	38.1	3.4	.188	1.21	4.00
3	Mike Adams M. Adams	0.59	37.0	2009	SDP	37	0	0		0	0.73	45	0	0	0	14	3	9	1	8	0	5	1	136	1	10.95	1.95	5.63	0.24	33.1	5.9	.159	2.19	3.41
4	Sean Doolittle S. Doolittle	0.60	45.0	2018	WSH	43	3	3	.500	0	1.60	60	0	0	25	21	8	8	3	6	2	35	1	163	1	12.00	1.20	10.00	0.60	36.8	3.7	.196	1.60	4.20
5	Dennis Eckersley D. Eckersley	0.61	57.2	1989	OAK	51	4	0	1.000	0	1.56	55	0	0	33	32	10	10	5	3	1	46	0	206	0	8.58	0.47	18.33	0.78	26.7	1.5	.190	1.56	4.99
6	Dennis Eckersley D. Eckersley	0.61	73.1	1990	OAK	63	4	2	.667	0	0.61	73	0	0	48	41	5	9	2	4	0	61	1	262	0	8.96	0.49	18.25	0.25	27.9	1.5	.213	1.10	5.03
7	Karl Spooner K. Spooner	0.62	32.1	1955	BKN	15	5	1	.833	0	1.11	30	0	0	2	12	4	4	0	8	3	10	1	117	0	8.35	2.23	3.75	0.00	25.6	6.8	.158	1.11	3.34
8	Koji Uehara K. Uehara	0.64	36.0	2012	TEX	37	0	0		0	1.75	43	0	0	1	20	7	7	4	3	0	13	0	130	1	10.75	0.75	14.33	1.00	33.1	2.3	.200	1.75	5.00
9	Arnie Portocarrero A. Portocarrero	0.64	34.1	1957	KCA	16	2	0	1.000	0	0.52	15	0	0	0	17	2	3	0	5	1	8	1	124	0	3.93	1.31	3.00	0.00	12.1	4.0	.165	0.79	4.46
10	Craig Kimbrel C. Kimbrel	0.65	62.2	2012	ATL	63	3	1	.750	0	1.01	116	0	0	42	27	7	7	3	14	2	56	0	231	5	16.66	2.01	8.29	0.43	50.2	6.1	.250	1.01	3.88
11	Emmanuel Clase E. Clase	0.66	74.1	2024	CLE	74	4	2	.667	0	0.61	66	0	0	47	39	5	10	2	10	2	66	1	270	2	7.99	1.21	6.60	0.24	24.4	3.7	.195	1.21	4.72
12	Steven Okert S. Okert	0.66	34.2	2025	HOU	30	1	2	.333	0	2.60	44	0	0	1	17	10	11	4	6	2	5	1	128	0	11.42	1.56	7.33	1.04	34.4	4.7	.181	2.86	4.41
13	Mariano Rivera M. Rivera	0.67	70.2	2008	NYY	64	6	5	.545	0	1.40	77	0	0	39	41	11	11	4	6	2	60	0	259	1	9.81	0.76	12.83	0.51	29.7	2.3	.218	1.40	5.22
14	Kenley Jansen K. Jansen	0.67	68.2	2016	LAD	72	3	2	.600	0	1.83	104	0	0	47	35	14	14	4	11	2	63	2	251	1	13.63	1.44	9.45	0.52	41.4	4.4	.238	1.83	4.59
15	Lefty Leifield L. Leifield	0.67	31.1	1910	PIT	10	5	0	1.000	0		11	0	0	2	16		1	0	5	0	9		110	0	3.16	1.44	2.20	0.00	10.0	4.5	.170	0.29	4.60
16	Neftali Feliz N. Feliz	0.68	31.0	2009	TEX	20	1	0	1.000	0	1.74	39	0	0	2	13	6	6	2	8	3	3	0	117	0	11.32	2.32	4.88	0.58	33.3	6.8	.169	1.74	3.77
17	Joaquin Benoit J. Benoit	0.68	60.1	2010	TBR	63	1	2	.333	0	1.34	75	0	0	1	30	9	10	6	11	0	16	1	217	1	11.19	1.64	6.82	0.90	34.6	5.1	.192	1.49	4.48
18	Larry Jansen L. Jansen	0.68	32.1	1953	NYG	10	2	1	.667	0	1.67	22	0	0	1	17	6	8	3	5	0	3		117	1	6.12	1.39	4.40	0.84	18.8	4.3	.161	2.23	4.73
19	Craig Kimbrel C. Kimbrel	0.68	69.0	2017	BOS	67	5	0	1.000	0	1.43	126	0	0	35	33	11	11	6	14	4	51	0	254	5	16.43	1.83	9.00	0.78	49.6	5.5	.260	1.43	4.30
20	Andrew Miller A. Miller	0.69	74.1	2016	TOT	70	10	1	.909	0	1.45	123	0	0	12	42	12	13	8	9	2	23	0	275	1	14.89	1.09	13.67	0.97	44.7	3.3	.256	1.57	5.09
21	Nick Mears N. Mears	0.69	32.0	2025	MIL	34	1	1	.500	0	2.25	27	0	0	0	18	8	9	2	4	0	1	0	115	2	7.59	1.13	6.75	0.56	23.5	3.5	.195	2.53	5.06
22	Tyler Rogers T. Rogers	0.69	36.1	2025	SFG	38	3	2	.600	0	1.24	31	0	0	0	21	5	5	2	4	0	5	0	130	0	7.68	0.99	7.75	0.50	23.8	3.1	.204	1.24	5.20
23	Eric Gagne E. Gagne	0.69	82.1	2003	LAD	77	2	3	.400	0	1.20	137	0	0	55	37	11	12	2	20	3	67	2	306	2	14.98	2.19	6.85	0.22	44.8	6.5	.243	1.31	4.04
24	Aaron Sanchez A. Sanchez	0.70	33.0	2014	TOR	24	2	2	.500	0	1.09	27	0	0	3	14	4	5	1	9	1	6	0	121	1	7.36	2.45	3.00	0.27	22.3	7.4	.157	1.36	3.82
25	J.J. Putz	0.70	71.2	2007	SEA	68	6	1	.857	0	1.38	82	0	0	40	37	11	11	6	13	2	65	0	260	3	10.30	1.63	6.31	0.75	31.5	5.0	.197	1.38	4.65