Roger Clemens struck out his most batters in a game pitched on September 18, 1996 and on April 29, 1986, with 20 strikeouts.

Interpreted as:

Roger Clemens most strike out in a regular-season game games

	NAME	SO	G	DATE	TM		OPP	DEC	GS	ERA	CG	SHO	SV	IP	H	ER	R	HR	BB	HBP	GF	IBB	TBF	WP
1	Roger Clemens R. Clemens	20	1	9/18/1996	BOS	@	DET	W	1	0.00	1	1	0	9.0	5	0	0	0	0	0	0	0	32	1
2	Roger Clemens R. Clemens	20	1	4/29/1986	BOS	vs	SEA	W	1	1.00	1	0	0	9.0	3	1	1	1	0	0	0	0	30	0
3	Roger Clemens R. Clemens	18	1	8/25/1998	TOR	vs	KCR	W	1	0.00	1	1	0	9.0	3	0	0	0	0	0	0	0	30	0
4	Roger Clemens R. Clemens	16	1	7/12/1997	TOR	@	BOS	W	1	1.13	0	0	0	8.0	4	1	1	0	0	2	0	0	30	0
5	Roger Clemens R. Clemens	16	1	7/15/1988	BOS	vs	KCR	W	1	0.00	1	0	0	9.0	5	0	1	0	1	0	0	0	34	0
6	Roger Clemens R. Clemens	16	1	5/9/1988	BOS	@	KCR	W	1	0.00	1	1	0	9.0	3	0	0	0	1	0	0	0	31	0
7	Roger Clemens R. Clemens	15	1	9/21/1998	TOR	vs	BAL	W	1	1.13	0	0	0	8.0	7	1	1	0	3	0	0	0	34	0
8	Roger Clemens R. Clemens	15	1	8/15/1998	TOR	vs	ANA		1	2.25	0	0	0	8.0	6	2	2	0	1	0	0	0	31	0
9	Roger Clemens R. Clemens	15	1	7/9/1988	BOS	@	CWS		1	2.25	0	0	0	8.0	3	2	2	1	1	1	0	0	29	0
10	Roger Clemens R. Clemens	15	1	8/21/1984	BOS	vs	KCR	W	1	1.00	1	0	0	9.0	7	1	1	0	0	0	0	0	33	0
11	Roger Clemens R. Clemens	14	1	8/2/1998	TOR	@	MIN	W	1	1.13	0	0	0	8.0	6	1	2	0	1	0	0	0	31	0
12	Roger Clemens R. Clemens	14	1	9/7/1997	TOR	vs	TEX	W	1	0.00	1	1	0	9.0	2	0	0	0	0	1	0	0	31	1
13	Roger Clemens R. Clemens	14	1	5/10/1997	TOR	@	MIN	W	1	5.14	0	0	0	7.0	8	4	4	1	0	1	0	0	29	1
14	Roger Clemens R. Clemens	14	1	7/25/1988	BOS	@	TEX	W	1	0.00	1	1	0	9.0	3	0	0	0	4	0	0	0	33	1
15	Roger Clemens R. Clemens	14	1	7/26/1987	BOS	vs	SEA	W	1	0.00	1	0	0	9.0	8	0	1	0	2	0	0	0	35	0
16	Roger Clemens R. Clemens	13	1	6/3/2002	NYY	vs	BAL		1	2.57	0	0	0	7.0	6	2	2	0	2	0	0	1	27	1
17	Roger Clemens R. Clemens	13	1	5/19/2002	NYY	vs	MIN	W	1	0.00	0	0	0	8.0	4	0	0	0	2	0	0	0	30	0
18	Roger Clemens R. Clemens	13	1	5/28/2000	NYY	vs	BOS	L	1	2.00	1	0	0	9.0	5	2	2	1	0	0	0	0	30	0
19	Roger Clemens R. Clemens	13	1	6/17/1999	NYY	vs	TEX	L	1	3.86	0	0	0	7.0	9	3	3	1	1	0	0	0	31	0
20	Roger Clemens R. Clemens	13	1	8/12/1997	TOR	vs	MIN	W	1	1.00	1	0	0	9.0	8	1	1	0	1	0	0	0	35	0
21	Roger Clemens R. Clemens	13	1	5/1/1996	BOS	vs	DET	W	1	1.00	1	0	0	9.0	6	1	1	0	0	0	0	0	33	0
22	Roger Clemens R. Clemens	13	1	5/11/1993	BOS	@	BAL	W	1	0.00	1	1	0	9.0	5	0	0	0	2	0	0	0	34	0
23	Roger Clemens R. Clemens	13	1	8/31/1989	BOS	vs	CAL	W	1	2.00	1	0	0	9.0	8	2	2	1	1	0	0	0	35	0
24	Roger Clemens R. Clemens	13	1	7/30/1988	BOS	vs	MIL	W	1	2.00	1	0	0	9.0	7	2	2	1	1	0	0	1	34	0
25	Roger Clemens R. Clemens	13	1	4/14/1988	BOS	vs	MIL	W	1	0.00	1	1	0	9.0	6	0	0	0	0	0	0	0	33	0