most strikeouts by a reliever in their second season

Mark Eichhorn fanned the most hitters by a relief pitcher in his 2nd season, with 166 strikeouts in his rookie season.

	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	162	1963	BOS	66	15	6	.714	0	2.04	0	0	23	132.1	94	30	31	9	51	5	58	12	541	5	11.02	3.47	3.18	0.61	29.9	9.4	1.10	.271	2.11	6.39
3	Josh Hader J. Hader	143	2018	MIL	55	6	1	.857	0	2.43	0	0	12	81.1	36	22	23	9	30	1	14	0	306	0	15.82	3.32	4.77	1.00	46.7	9.8	0.81	.220	2.55	3.98
4	Rob Dibble R. Dibble	141	1989	CIN	74	10	5	.667	0	2.09	0	0	2	99.0	62	23	23	4	39	3	18	11	401	7	12.82	3.55	3.62	0.36	35.2	9.7	1.02	.271	2.09	5.64
5	Mariano Rivera M. Rivera	130	1996	NYY	61	8	3	.727	0	2.09	0	0	5	107.2	73	25	25	1	34	2	14	3	425	1	10.87	2.84	3.82	0.08	30.6	8.0	0.99	.279	2.09	6.10
6	Bruce Sutter B. Sutter	129	1977	CHC	62	7	3	.700	0	1.34	0	0	31	107.1	69	16	21	5	23	1	48	7	411	7	10.82	1.93	5.61	0.42	31.4	5.6	0.86	.253	1.76	5.79
7	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
8	Mitch Williams M. Williams	123	1987	TEX	84	8	5	.615	0	3.10	0	0	6	104.2	59	36	42	8	91	7	32	7	451	4	10.58	7.82	1.35	0.69	27.3	20.2	1.43	.230	3.61	5.07
9	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
10	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
11	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
12	Billy McCool B. McCool	113	1965	CIN	60	9	8	.529	0	3.91	0	0	21	96.2	78	42	42	8	45	2	43	7	404	8	10.52	4.19	2.51	0.74	28.0	11.1	1.27	.297	3.91	7.26
13	Félix Bautista F. Bautista	110	2023	BAL	56	8	2	.800	0	1.48	0	0	33	61.0	30	10	14	4	26	2	46	0	237	7	16.23	3.84	4.23	0.59	46.4	11.0	0.92	.274	2.07	4.43
14	Byung-Hyun Kim B. Kim	109	2000	ARI	60	6	6	.500	0	4.08	0	0	14	68.1	48	31	35	7	42	9	30	5	305	3	14.36	5.53	2.60	0.92	35.7	13.8	1.32	.297	4.61	6.32
15	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
16	Matt Brash M. Brash	107	2023	SEA	78	9	4	.692	0	3.06	0	0	4	70.2	65	24	26	3	29	6	7	0	308	11	13.63	3.69	3.69	0.38	34.7	9.4	1.33	.380	3.31	8.28
17	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
18	Steve Foucault S. Foucault	106	1974	TEX	69	8	9	.471	0	2.24	0	0	12	144.1	123	36	51	8	40	5	53	5	584	3	6.61	2.49	2.65	0.50	18.2	6.8	1.13	.271	3.18	7.67
19	Mark Clear M. Clear	105	1980	CAL	58	11	11	.500	0	3.30	0	0	9	106.1	82	39	51	2	65	5	40	9	461	4	8.89	5.50	1.62	0.17	22.8	14.1	1.38	.282	4.32	6.94
20	Cade Smith C. Smith	104	2025	CLE	76	8	5	.615	0	2.93	0	0	16	73.2	55	24	31	4	19	4	30	3	300	3	12.71	2.32	5.47	0.49	34.7	6.3	1.00	.302	3.79	6.72
21	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
22	John Rocker J. Rocker	104	1999	ATL	74	4	5	.444	0	2.49	0	0	38	72.1	47	20	24	5	37	1	61	4	301	7	12.94	4.60	2.81	0.62	34.6	12.3	1.16	.273	2.99	5.85
23	Terry Forster T. Forster	104	1972	CWS	62	6	5	.545	0	2.25	0	0	29	100.0	75	25	31	0	44	3	45	3	419	5	9.36	3.96	2.36	0.00	24.8	10.5	1.19	.280	2.79	6.75
24	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
25	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