most strikeouts for a rookie relief pitcher in a single season

Mark Eichhorn has fanned the most batters by a rookie relief pitcher, with 166 strikeouts in 1986.

	NAME	SO	SEASON	TM	G	W	L	W%	GS	ERA	CG	SHO	SV	IP	H	ER	R	HR	BB	HBP	GF	IBB	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	H/9
1	Mark Eichhorn M. Eichhorn	166	1986	TOR	69	14	6	.700	0	1.72	0	0	10	157.0	105	30	32	8	45	7	38	14	612	2	9.52	2.58	3.69	0.46	27.1	7.4	0.96	.251	1.83	6.02
2	Dick Radatz D. Radatz	144	1962	BOS	62	9	6	.600	0	2.24	0	0	24	124.2	95	31	32	9	40	4	53	2	504	3	10.40	2.89	3.60	0.65	28.6	7.9	1.08	.280	2.31	6.86
3	Dellin Betances D. Betances	135	2014	NYY	70	5	0	1.000	0	1.40	0	0	1	90.0	46	14	15	4	24	4	8	1	341	2	13.50	2.40	5.63	0.40	39.6	7.0	0.78	.241	1.50	4.60
4	Craig Kimbrel C. Kimbrel	127	2011	ATL	79	4	3	.571	0	2.10	0	0	46	77.0	48	18	19	3	32	1	64	1	306	4	14.84	3.74	3.97	0.35	41.5	10.5	1.04	.315	2.22	5.61
5	Steve Bedrosian S. Bedrosian	114	1982	ATL	61	7	5	.583	0	2.29	0	0	11	122.0	86	31	33	4	51	3	30	4	499	0	8.41	3.76	2.24	0.30	22.8	10.2	1.12	.251	2.43	6.34
6	Kyle Barraclough K. Barraclough	113	2016	MIA	75	6	3	.667	0	2.85	0	0	0	72.2	45	23	24	1	44	2	6	1	306	8	14.00	5.45	2.57	0.12	36.9	14.4	1.22	.301	2.97	5.57
7	Pedro Martinez P. Martinez	113	1993	LAD	63	10	3	.769	0	2.26	0	0	2	99.2	65	25	26	5	53	4	20	4	409	2	10.20	4.79	2.13	0.45	27.6	13.0	1.18	.256	2.35	5.87
8	Nick Anderson N. Anderson	110	2019	TOT	68	5	4	.556	0	3.32	0	0	1	65.0	52	24	24	8	18	2	3	4	264	4	15.23	2.49	6.11	1.11	41.7	6.8	1.08	.349	3.32	7.20
9	DeWayne Buice D. Buice	109	1987	CAL	57	6	7	.462	0	3.39	0	0	17	114.0	87	43	45	12	40	2	44	3	457	3	8.61	3.16	2.73	0.95	23.9	8.8	1.11	.255	3.55	6.87
10	Trevor Rosenthal T. Rosenthal	108	2013	STL	74	2	4	.333	0	2.63	0	0	3	75.1	63	22	25	4	20	6	15	0	311	3	12.90	2.39	5.40	0.48	34.7	6.4	1.10	.341	2.99	7.53
11	Takashi Saito T. Saito	107	2006	LAD	72	6	2	.750	0	2.07	0	0	24	78.1	48	18	19	3	23	2	48	3	303	2	12.29	2.64	4.65	0.34	35.3	7.6	0.91	.268	2.18	5.51
12	Scott Williamson S. Williamson	107	1999	CIN	62	12	7	.632	0	2.41	0	0	19	93.1	54	25	29	8	43	1	40	6	366	13	10.32	4.15	2.49	0.77	29.2	11.7	1.04	.222	2.80	5.21
13	Dan McGinn D. McGinn	107	1969	MON	73	7	9	.438	0	3.92	0	0	6	126.1	118	55	64	7	64	4	25	8	553	9	7.62	4.56	1.67	0.50	19.3	11.6	1.44	.299	4.56	8.41
14	Hoyt Wilhelm H. Wilhelm	107	1952	NYG	71	15	3	.833	0	2.43	0	0	11	159.1	127	43	60	12	56	5	32		646	3	6.04	3.16	1.91	0.68	16.6	8.7	1.15	.247	3.39	7.17
15	Ryan Yarbrough R. Yarbrough	106	2018	TBR	32	14	4	.778	0	3.72	0	0	0	118.2	110	49	52	15	42	6	3	5	505	0	8.04	3.19	2.52	1.14	21.0	8.3	1.28	.283	3.94	8.34
16	Mason Miller M. Miller	104	2024	OAK	55	2	2	.500	0	2.49	0	0	28	65.0	36	18	23	6	21	1	44	3	249	2	14.40	2.91	4.95	0.83	41.8	8.4	0.88	.256	3.18	4.98
17	Cade Smith C. Smith	103	2024	CLE	74	6	1	.857	0	1.91	0	0	1	75.1	51	16	16	1	17	3	2	0	289	0	12.31	2.03	6.06	0.12	35.6	5.9	0.90	.303	1.91	6.09
18	Seunghwan Oh S. Oh	103	2016	STL	76	6	3	.667	0	1.92	0	0	19	79.2	55	17	20	5	18	2	35	3	313	3	11.64	2.03	5.72	0.56	32.9	5.8	0.92	.270	2.26	6.21
19	Jim York J. York	103	1971	KCR	53	5	5	.500	0	2.89	0	0	3	93.1	70	30	32	7	44	3	21	7	396	4	9.93	4.24	2.34	0.68	26.0	11.1	1.22	.264	3.09	6.75
20	Jeff Reardon J. Reardon	101	1980	NYM	61	8	7	.533	0	2.61	0	0	6	110.1	96	32	36	10	47	0	35	15	475	2	8.24	3.83	2.15	0.82	21.3	9.9	1.30	.271	2.94	7.83
21	Chad Green C. Green	100	2017	NYY	39	5	0	1.000	0	1.61	0	0	0	67.0	32	12	12	4	16	2	4	0	244	3	13.43	2.15	6.25	0.54	41.0	6.6	0.72	.230	1.61	4.30
22	Josh James J. James	99	2019	HOU	48	5	1	.833	0	4.77	0	0	1	60.1	46	32	34	10	35	4	18	0	263	6	14.77	5.22	2.83	1.49	37.6	13.3	1.34	.313	5.07	6.86
23	Ronny Henriquez R. Henriquez	98	2025	MIA	69	7	1	.875	0	2.22	0	0	7	73.0	53	18	23	8	27	4	9	2	303	2	12.08	3.33	3.63	0.99	32.3	8.9	1.10	.271	2.84	6.53
24	Mark Clear M. Clear	98	1979	CAL	52	11	5	.688	0	3.63	0	0	14	109.0	87	44	48	6	68	3	37	5	481	9	8.09	5.61	1.44	0.50	20.4	14.1	1.42	.265	3.96	7.18
25	Jonathan Broxton J. Broxton	97	2006	LAD	68	4	1	.800	0	2.59	0	0	3	76.1	61	22	25	7	33	1	20	6	320	7	11.44	3.89	2.94	0.83	30.3	10.3	1.23	.297	2.95	7.19