lowest single season whip amongst relievers with minimum 15 ip in 1900s

Between the 1900 and 1909 seasons, Cy Young had the lowest WHIP by a relief pitcher with 15.0+ innings pitched in a season, with a WHIP of 0.40 in 1904.

	NAME	WHIP	IP	SEASON	TM	G	W	L	W%	GS	ERA	SO	CG	SHO	SV	H	ER	R	HR	BB	HBP	GF	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	BABIP	RA	H/9
1	Cy Young C. Young	0.40	15.0	1904	BSA	2	1	0	1.000	0	0.60	6	0	0	1	6	1	1	0	0	0	2		0	3.60	0.00		0.00				0.60	3.60
2	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
3	Mordecai Brown M. Brown	0.54	18.2	1907	CHC	7	3	0	1.000	0		11	0	0	2	10		3	0	0	1	7	62	1	5.30	0.00		0.00	17.7	0.0	.200	1.45	4.82
4	Harry Coveleski H. Coveleski	0.65	20.0	1907	PHN	4	1	0	1.000	0		6	0	0	0	10		2	0	3	1	4	72	0	2.70	1.35	2.00	0.00	8.3	4.2	.161	0.90	4.50
5	Joe Lake J. Lake	0.66	19.2	1909	NYH	5	2	0	1.000	0		9	0	0	1	10		4	0	3	0	5	68	3	4.12	1.37	3.00	0.00	13.2	4.4	.179	1.83	4.58
6	Jack Powell J. Powell	0.66	22.2	1901	STL	8	2	2	.500	0	2.78	10	0	0	3	12	7	9	3	3	2	8		0	3.97	1.19	3.33	1.19				3.57	4.76
7	Tully Sparks T. Sparks	0.67	15.0	1906	PHN	5	1	0	1.000	0		7	0	0	3	6		3	1	4	1	5	55	0	4.20	2.40	1.75	0.60	12.7	7.3	.119	1.80	3.60
8	Rube Waddell R. Waddell	0.71	28.1	1902	PHA	6	5	0	1.000	0	0.32	20	0	0	0	15	1	3	0	5	0	5		0	6.35	1.59	4.00	0.00				0.95	4.76
9	Ed Walsh E. Walsh	0.71	41.0	1907	CWS	10	0	1	.000	0		23	0	0	4	24		6	0	5	0	10		2	5.05	1.10	4.60	0.00				1.32	5.27
10	Al Orth A. Orth	0.73	15.0	1903	WSH	4	0	0		0	1.20	8	0	0	2	9	2	3	0	2	0	4		0	4.80	1.20	4.00	0.00				1.80	5.40
11	Orval Overall O. Overall	0.75	18.2	1909	CHC	6	1	0	1.000	0		15	0	0	3	8		2	0	6	0	6	66	0	7.23	2.89	2.50	0.00	22.7	9.1	.178	0.96	3.86
12	Christy Mathewson C. Mathewson	0.75	28.0	1908	NYG	12	5	1	.833	0		23	0	0	3	15		5	0	6	1	10	105	0	7.39	1.93	3.83	0.00	21.9	5.7	.200	1.61	4.82
13	Mike Lynch M. Lynch	0.75	24.0	1906	PIT	6	2	0	1.000	0		11	0	0	0	15		8	0	3	1	6	88	0	4.13	1.13	3.67	0.00	12.5	3.4	.205	3.00	5.63
14	Cy Young C. Young	0.76	29.0	1905	BSA	5	5	0	1.000	0		17	0	0	0	20		3	0	2	0	5		1	5.28	0.62	8.50	0.00				0.93	6.21
15	Jim Scott J. Scott	0.76	23.2	1909	CWS	7	1	0	1.000	0		14	0	0	0	10		6	0	8	4	6	89	1	5.32	3.04	1.75	0.00	15.7	9.0	.159	2.28	3.80
16	Bob Ewing B. Ewing	0.76	19.2	1905	CIN	6	2	0	1.000	0		6	0	0	1	10		4	0	5	1	6	74	1	2.75	2.29	1.20	0.00	8.1	6.8	.161	1.83	4.58
17	Ed Walsh E. Walsh	0.76	38.0	1908	CWS	17	5	1	.833	0		35	0	0	6	28		18	1	1	0	16	140	0	8.29	0.24	35.00	0.24	25.0	0.7	.262	4.26	6.63
18	Christy Mathewson C. Mathewson	0.77	24.2	1905	NYG	6	2	1	.667	0		11	0	0	3	16		9	0	3	0	6	91	0	4.01	1.09	3.67	0.00	12.1	3.3	.208	3.28	5.84
19	Doc White D. White	0.77	23.1	1906	CWS	4	2	1	.667	0		11	0	0	0	14		4	0	4	1	4		1	4.24	1.54	2.75	0.00				1.54	5.40
20	Babe Adams B. Adams	0.77	42.2	1909	PIT	13	6	0	1.000	0		19	0	0	2	23		7	0	10	2	10	155	1	4.01	2.11	1.90	0.00	12.3	6.5	.185	1.48	4.85
21	Lew Moren L. Moren	0.78	29.1	1909	PHN	9	3	3	.500	0		16	0	0	1	17		12	2	6	0	9	108	2	4.91	1.84	2.67	0.61	14.8	5.6	.179	3.68	5.22
22	Clark Griffith C. Griffith	0.79	20.1	1904	NYH	5	2	0	1.000	0	0.44	11	0	0	0	11	1	2	1	5	1	5		0	4.87	2.21	2.20	0.44				0.89	4.87
23	Jack Ryan J. Ryan	0.80	26.1	1908	CLE	7	0	1	.000	0		6	0	0	1	19		11	3	2	0	6	89	0	2.05	0.68	3.00	1.03	6.7	2.2	.205	3.76	6.49
24	Chief Bender C. Bender	0.80	20.0	1906	PHA	9	1	0	1.000	0		17	0	0	3	14		6	1	2	1	9		0	7.65	0.90	8.50	0.45				2.70	6.30
25	Orval Overall O. Overall	0.81	24.2	1908	CHC	10	2	0	1.000	0		18	0	0	3	12		3	0	8	1	9	89	1	6.57	2.92	2.25	0.00	20.2	9.0	.194	1.09	4.38