Houston Astros Strikeouts / 9 Leaders

Career totals with the Astros and the best single seasons in club history. Records run through the 2025 season.

Astros records →

Nolan Ryan holds the Astros career record with 9.05 strikeouts / 9. The single-season record is 13.82, by Gerrit Cole in 2019.

Rate records use the league's own minimums: a season needs the standard 1.0 inning per team game with the club, a career 1,000+ innings pitched with the club.

All-time Astros leaders

Career totals with the club

#	Player	With the club	K/9	G
1	Nolan Ryan	1980–1988	9.05	282
2	Framber Valdez	2018–2025	8.77	188
3	J. R. Richard	1971–1980	8.37	238
4	Wandy Rodriguez	2005–2012	7.53	227
5	Roy Oswalt	2001–2010	7.42	303
6	Darryl Kile	1991–1997	7.30	209
7	Shane Reynolds	1992–2002	7.26	274
8	Dallas Keuchel	2012–2018	7.15	192
9	Mike Scott	1983–1991	6.96	263
10	Don Wilson	1966–1974	6.60	266
11	Turk Farrell	1962–1967	6.15	181
12	Mike Hampton	1994–2009	6.07	216
13	Jim Deshaies	1985–1991	5.97	181
14	Larry Dierker	1964–1976	5.83	345
15	Ken Forsch	1970–1980	4.91	421
16	Bob Knepper	1981–1989	4.90	284
17	Joe Niekro	1975–1985	4.67	397

Single-season Astros records

Best seasons in club history

#	Player	Season	K/9	G
1	Gerrit Cole	2019	13.82	33
2	Gerrit Cole	2018	12.40	32
3	Justin Verlander	2018	12.20	34
4	Justin Verlander	2019	12.11	34
5	Nolan Ryan	1987	11.48	34
6	Charlie Morton	2018	10.83	30
7	Lance McCullers	2021	10.26	28
8	Hunter Brown	2025	10.00	31
8	Mike Scott	1986	10.00	37
10	J. R. Richard	1978	9.90	36
11	Nolan Ryan	1986	9.81	30
12	Framber Valdez	2020	9.68	11
13	Nolan Ryan	1984	9.65	30
14	J. R. Richard	1979	9.64	38
15	Tom Griffin	1969	9.56	31
16	Justin Verlander	2022	9.51	28
17	Hunter Brown	2024	9.48	31
18	Don Wilson	1969	9.40	34
19	Nolan Ryan	1988	9.33	33
20	Roger Clemens	2004	9.15	33
21	Framber Valdez	2023	9.09	31
22	Zack Greinke	2020	9.00	12
22	Darryl Kile	1996	9.00	35
24	Ronel Blanco	2024	8.93	30
25	Cristian Javier	2023	8.83	31