what are the most strikeouts by a pitcher in a season after the all-star break

Sandy Koufax has struck out the most hitters in a season after the All-Star Game, with 187 strikeouts in 1965.

	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	Sandy Koufax S. Koufax	187	1965	LAD	22	11	5	.688	20	1.94	13	6	2	166.2	92	36	39	12	37	1	2	4	627	6	10.10	2.00	5.05	0.65	29.8	5.9	0.77	.205	2.11	4.97
2	Nolan Ryan N. Ryan	173	1972	CAL	17	8	8	.500	17	1.41	10	4	0	140.2	74	22	29	2	75	3	0	4	562	8	11.07	4.80	2.31	0.13	30.8	13.3	1.06	.233	1.86	4.73
3	Randy Johnson R. Johnson	170	2001	ARI	16	10	1	.909	15	2.23	1	1	0	117.0	83	29	31	6	29	8	1	2	461	2	13.08	2.23	5.86	0.46	36.9	6.3	0.96	.310	2.38	6.38
4	Nolan Ryan N. Ryan	166	1974	CAL	17	10	7	.588	16	2.10	14	1	0	141.1	79	33	39	6	77	3	1	1	574	5	10.57	4.90	2.16	0.38	28.9	13.4	1.10	.227	2.48	5.03
5	Randy Johnson R. Johnson	163	2002	ARI	16	12	2	.857	16	2.15	6	3	0	121.1	84	29	33	11	36	8	0	1	485	1	12.09	2.67	4.53	0.82	33.6	7.4	0.99	.273	2.45	6.23
6	Nolan Ryan N. Ryan	161	1976	CAL	18	10	8	.556	18	3.17	10	4	0	142.0	95	50	57	7	89	4	0	0	594	3	10.20	5.64	1.81	0.44	27.1	15.0	1.30	.264	3.61	6.02
7	Sam McDowell S. McDowell	161	1965	CLE	21	8	5	.615	18	2.17	7	1	2	145.0	96	35	43	6	60	5	3	6	584	8	9.99	3.72	2.68	0.37	27.6	10.3	1.08	.256	2.67	5.96
8	Curt Schilling C. Schilling	160	1997	PHI	16	8	3	.727	16	2.30	4	2	0	121.1	89	31	33	10	21	2	0	1	466	4	11.87	1.56	7.62	0.74	34.3	4.5	0.91	.289	2.45	6.60
9	Randy Johnson R. Johnson	159	1998	TOT	15	12	3	.800	15	1.37	7	6	0	118.1	77	18	23	6	37	3	0	1	460	0	12.09	2.81	4.30	0.46	34.6	8.0	0.96	.278	1.75	5.86
10	Bob Feller B. Feller	158	1946	CLE	28	11	10	.524	22	2.45	17	4	4	191.1	137	52	62	4	88	2	5		782	1	7.43	4.14	1.80	0.19	20.2	11.3	1.18	.251	2.92	6.44
11	Gerrit Cole G. Cole	156	2019	HOU	14	11	0	1.000	14	1.79	0	0	0	95.2	53	19	20	12	18	1	0	0	354	3	14.68	1.69	8.67	1.13	44.1	5.1	0.74	.246	1.88	4.99
12	J.R. Richard	156	1979	HOU	16	11	3	.786	16	1.75	11	3	0	133.2	82	26	29	3	43	2	0	3	520	4	10.50	2.90	3.63	0.20	30.0	8.3	0.94	.250	1.95	5.52
13	Sandy Koufax S. Koufax	156	1963	LAD	20	11	2	.846	20	2.04	8	3	0	154.2	118	35	37	11	24	2	0	6	610	3	9.08	1.40	6.50	0.64	25.6	3.9	0.92	.257	2.15	6.87
14	Randy Johnson R. Johnson	155	1992	SEA	16	7	5	.583	16	3.55	3	0	0	116.2	82	46	50	4	73	5	0	0	495	8	11.96	5.63	2.12	0.31	31.3	14.7	1.33	.302	3.86	6.33
15	Randy Johnson R. Johnson	153	1999	ARI	15	8	2	.800	15	1.89	5	1	0	119.0	91	25	30	13	26	4	0	1	472	1	11.57	1.97	5.88	0.98	32.4	5.5	0.98	.283	2.27	6.88
16	Nolan Ryan N. Ryan	153	1989	TEX	15	6	6	.500	15	3.51	2	1	0	112.2	80	44	50	4	51	5	0	2	481	11	12.22	4.07	3.00	0.32	31.8	10.6	1.16	.284	3.99	6.39
17	Roger Clemens R. Clemens	152	1997	TOR	16	8	4	.667	16	2.44	5	2	0	125.2	104	34	38	3	32	6	0	1	508	2	10.89	2.29	4.75	0.21	29.9	6.3	1.08	.321	2.72	7.45
18	Sandy Koufax S. Koufax	152	1966	LAD	20	12	5	.706	20	1.86	12	2	0	154.2	110	32	36	8	46	0	0	3	618	3	8.84	2.68	3.30	0.47	24.6	7.4	1.01	.248	2.09	6.40
19	Roger Clemens R. Clemens	151	1998	TOR	15	11	0	1.000	15	1.71	3	3	0	115.2	73	22	24	4	32	3	0	0	446	2	11.75	2.49	4.72	0.31	33.9	7.2	0.91	.270	1.87	5.68
20	Pedro Martinez P. Martinez	151	1997	MON	15	7	4	.636	15	2.07	6	2	0	117.1	77	27	33	8	32	5	0	1	461	2	11.58	2.45	4.72	0.61	32.8	6.9	0.93	.260	2.53	5.91
21	Nolan Ryan N. Ryan	150	1973	CAL	16	10	4	.714	15	2.91	10	1	0	126.2	95	41	45	5	62	2	1	1	531	7	10.66	4.41	2.42	0.36	28.2	11.7	1.24	.288	3.20	6.75
22	Bob Gibson B. Gibson	150	1968	STL	16	11	4	.733	16	1.19	14	7	0	144.0	97	19	25	6	27	3	0	2	553	1	9.38	1.69	5.56	0.38	27.1	4.9	0.86	.248	1.56	6.06
23	Bob Gibson B. Gibson	150	1964	STL	22	13	6	.684	20	3.29	10	1	1	164.0	148	60	67	12	46	7	1	4	686	4	8.23	2.52	3.26	0.66	21.9	6.7	1.18	.289	3.68	8.12
24	Randy Johnson R. Johnson	149	2000	ARI	16	5	5	.500	16	3.81	3	1	0	104.0	105	44	55	10	40	2	0	0	450	3	12.89	3.46	3.73	0.87	33.1	8.9	1.39	.382	4.76	9.09
25	Justin Verlander J. Verlander	147	2019	HOU	15	11	2	.846	15	2.06	2	1	0	96.1	61	22	23	10	15	2	0	0	361	1	13.73	1.40	9.80	0.93	40.7	4.2	0.79	.273	2.15	5.70

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Some of the information used here was obtained free of charge from Retrosheet.

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