most strikeouts in a single game for a reliever

Randy Johnson has struck out the most hitters by a relief pitcher in a game, with 16 strikeouts against the Padres on July 18, 2001.

Interpreted as:

most strikeouts in a single regular-season game for a reliever

	NAME	SO	DATE	TM		OPP	DEC	GS	ERA	CG	SHO	SV	IP	H	ER	R	HR	BB	HBP	GF	IBB	TBF	WP
1	Randy Johnson R. Johnson	16	7/18/2001	ARI	@	SDP	W	0	0.00	0	0	0	7.0	1	0	0	0	1	0	1	0	23	0
2	Walter Johnson W. Johnson	15	7/25/1913	WSH	vs	SLA		0	0.79	0	0	0	11.1	7	1	2	0	2	0	1		42	0
3	Denny McLain D. McLain	14	6/15/1965	DET	vs	BOS		0	2.70	0	0	0	6.2	6	2	2	0	2	0	0	0	28	1
4	Rube Marquard R. Marquard	14	5/13/1911	NYG	vs	SLN		0		0	0	1	8.0	12		5	0	3	1	1		38	0
5	Nick Pivetta N. Pivetta	13	7/17/2023	BOS	@	OAK	W	0	0.00	0	0	0	6.0	0	0	0	0	2	0	0	0	20	0
6	Billy O'Dell B. O'Dell	13	7/4/1961	SFG	@	CHC	W	0	1.00	0	0	0	9.0	2	1	1	1	1	0	1	0	29	0
7	Mark Guthrie M. Guthrie	12	5/25/1995	MIN	@	DET	W	0	3.00	0	0	0	6.0	4	2	2	1	0	1	0	0	22	0
8	Diego Segui D. Segui	12	9/22/1974	BOS	vs	BAL		0	4.70	0	0	0	7.2	9	4	4	1	3	0	0	1	34	3
9	Jumbo Brown J. Brown	12	6/3/1933	NYY	vs	PHA	W	0	0.00	0	0	0	6.1	5	0	0	0	5	0	1		28	1
10	Rube Waddell R. Waddell	12	8/18/1905	PHA	@	SLA		0		0	0	0	7.1	4		0	0	1	0	1			0
11	Jim Ray J. Ray	11	4/15/1968	HOU	vs	NYM		0	0.00	0	0	0	7.0	2	0	0	0	1	0	0	1	24	0
12	Dave Vineyard D. Vineyard	11	9/7/1964	BAL	@	KCA		0	3.00	0	0	0	6.0	3	2	2	1	2	0	0	0	23	0
13	Harvey Haddix H. Haddix	11	6/15/1964	BAL	vs	CWS		0	2.08	0	0	0	8.2	8	2	2	0	0	0	1	0	34	0
14	Sonny Siebert S. Siebert	11	5/10/1964	CLE	vs	NYY		0	4.50	0	0	0	6.0	7	3	3	1	3	0	0	0	29	0
15	Dick Radatz D. Radatz	11	6/11/1963	BOS	@	DET	W	0	0.00	0	0	0	8.2	3	0	0	0	1	0	1	0	30	0
16	Steve Hamilton S. Hamilton	11	5/11/1963	NYY	@	BAL	W	0	0.00	0	0	0	8.1	3	0	0	0	0	0	1	0	28	0
17	Dave Hillman D. Hillman	11	5/28/1959	CHC	@	LAD	W	0	2.35	0	0	0	7.2	5	2	2	1	1	0	0	1	29	1
18	Gene Conley G. Conley	11	5/2/1959	PHI	vs	CHC		0	0.00	0	0	0	9.0	6	0	0	0	1	0	1	0	33	0
19	Larry Jansen L. Jansen	11	8/18/1953	NYG	@	BKN		0	0.00	0	0	0	8.0	2	0	0	0	3	0	0	1	29	0
20	Tom Hughes T. Hughes	11	5/22/1909	WSH	@	CLE		0		0	0	1	6.0	5		0	0	0	0	1		23	0
21	Gus Dorner G. Dorner	11	5/26/1903	CLE	vs	PHA		0	3.86	0	0	0	7.0	5	3	3	1	2	0	1			0
22	Nick Pivetta N. Pivetta	10	6/26/2024	BOS	vs	TOR	L	0	3.00	0	0	0	6.0	4	2	3	1	0	0	0	0	23	0
23	Tyler Alexander T. Alexander	10	8/2/2020	DET	vs	CIN		0	0.00	0	0	0	3.2	0	0	0	0	1	1	0	0	12	0
24	Arthur Rhodes A. Rhodes	10	8/20/1995	BAL	@	OAK		0	3.86	0	0	0	4.2	6	2	2	0	1	0	0	0	19	0
25	Arthur Rhodes A. Rhodes	10	7/13/1995	BAL	vs	KCR		0	1.29	0	0	0	7.0	3	1	1	1	1	0	0	0	25	0