pitchers with 40+ strikeouts and a 0.75 or lower era in one month since april 1913

Walter Johnson got 41 strikeouts with an ERA of 0.75 or better in June 1919.

	NAME	MONTH	SO	ERA	G	W	L	W%	GS	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	Walter Johnson W. Johnson	June 1919	41	0.63	8	6	2	.750	8	8	2	0	71.0	46		10	0	12	2	0		264	0	5.20	1.52	3.42	0.00	15.5	4.5	0.82	.220	1.27	5.83
2	Lefty Grove L. Grove	June 1926	41	0.51	8	2	3	.400	6	5	0	2	53.0	47	3	15	1	15	0	2		221	2	6.96	2.55	2.73	0.17	18.6	6.8	1.17	.280	2.55	7.98
3	Sandy Koufax S. Koufax	June 1964	47	0.71	6	5	0	1.000	6	4	3	0	51.0	24	4	4	1	11	0	0	2	189	1	8.29	1.94	4.27	0.18	24.9	5.8	0.69	.177	0.71	4.24
4	Juan Marichal J. Marichal	June 1965	50	0.74	7	5	2	.714	7	5	3	0	61.0	42	5	6	1	7	0	0	1	228	0	7.38	1.03	7.14	0.15	21.9	3.1	0.80	.241	0.89	6.20
5	Don Drysdale D. Drysdale	May 1968	45	0.53	8	5	1	.833	8	5	5	0	68.0	46	4	6	0	12	1	0	2	257	2	5.96	1.59	3.75	0.00	17.5	4.7	0.85	.231	0.79	6.09
6	Bob Gibson B. Gibson	June 1968	43	0.50	6	6	0	1.000	6	6	5	0	54.0	28	3	3	1	8	2	0	0	193	0	7.17	1.33	5.38	0.17	22.3	4.1	0.67	.194	0.50	4.67
7	Bob Gibson B. Gibson	July 1968	48	0.50	6	6	0	1.000	6	6	3	0	54.0	35	3	3	0	8	2	0	0	205	1	8.00	1.33	6.00	0.00	23.4	3.9	0.80	.238	0.50	5.83
8	Jerry Koosman J. Koosman	June 1969	47	0.72	6	4	2	.667	6	4	2	0	50.0	34	4	5	2	10	0	0	1	189	1	8.46	1.80	4.70	0.36	24.9	5.3	0.88	.246	0.90	6.12
9	Jim Kaat J. Kaat	September 1974	42	0.35	6	6	0	1.000	6	5	2	0	51.2	30	2	3	0	9	1	0	0	193	0	7.32	1.57	4.67	0.00	21.8	4.7	0.75	.213	0.52	5.23
10	J.R. Richard	August 1979	62	0.67	6	5	1	.833	6	6	1	0	54.0	30	4	5	0	18	1	0	1	208	1	10.33	3.00	3.44	0.00	29.8	8.7	0.89	.236	0.83	5.00
11	Fernando Valenzuela F. Valenzuela	April 1981	43	0.20	5	5	0	1.000	5	5	4	0	45.0	28	1	1	0	11	0	0	1	169	0	8.60	2.20	3.91	0.00	25.4	6.5	0.87	.243	0.20	5.60
12	Nolan Ryan N. Ryan	May 1984	50	0.20	6	5	0	1.000	6	3	2	0	45.1	26	1	3	0	16	1	0	0	174	0	9.93	3.18	3.13	0.00	28.7	9.2	0.93	.243	0.60	5.16
13	Jack Morris J. Morris	July 1986	47	0.54	6	5	1	.833	6	4	3	0	50.0	33	3	4	1	8	0	0	1	186	3	8.46	1.44	5.88	0.18	25.3	4.3	0.82	.246	0.72	5.94
14	Mark Langston M. Langston	September 1988	46	0.50	6	5	1	.833	6	4	3	0	53.2	23	3	3	1	24	0	0	0	199	0	7.71	4.02	1.92	0.17	23.1	12.1	0.88	.172	0.50	3.86
15	Javier Vazquez J. Vazquez	August 2001	45	0.55	6	5	1	.833	6	2	1	0	49.0	26	3	4	2	8	0	0	1	175	1	8.27	1.47	5.63	0.37	25.7	4.6	0.69	.200	0.73	4.78
16	Pedro Martinez P. Martinez	July 2002	59	0.64	6	5	0	1.000	6	0	0	0	42.1	22	3	5	0	9	6	0	0	159	1	12.54	1.91	6.56	0.00	37.1	5.7	0.73	.259	1.06	4.68
17	Randy Johnson R. Johnson	September 2002	49	0.66	5	5	0	1.000	5	3	1	0	41.0	24	3	5	3	7	2	0	0	156	0	10.76	1.54	7.00	0.66	31.4	4.5	0.76	.221	1.10	5.27
18	Johan Santana J. Santana	September 2004	52	0.45	6	5	0	1.000	6	0	0	0	40.0	20	2	2	0	7	2	0	0	146	1	11.70	1.58	7.43	0.00	35.6	4.8	0.68	.235	0.45	4.50
19	Zack Greinke Z. Greinke	April 2009	44	0.50	5	5	0	1.000	5	2	1	0	36.0	24	2	3	0	8	1	0	0	138	1	11.00	2.00	5.50	0.00	31.9	5.8	0.89	.282	0.75	6.00
20	Clayton Kershaw C. Kershaw	July 2015	45	0.27	4	3	0	1.000	4	2	2	0	33.0	19	1	1	0	2	1	0	0	120	2	12.27	0.55	22.50	0.00	37.5	1.7	0.64	.264	0.27	5.18
21	Jake Arrieta J. Arrieta	August 2015	43	0.43	6	6	0	1.000	6	1	1	0	42.1	19	2	4	0	10	2	0	0	159	2	9.14	2.13	4.30	0.00	27.0	6.3	0.69	.183	0.85	4.04
22	Chris Sale C. Sale	July 2018	43	0.36	4	3	0	1.000	4	0	0	0	25.0	16	1	1	0	4	2	0	0	96	1	15.48	1.44	10.75	0.00	44.8	4.2	0.80	.340	0.36	5.76
23	Jack Flaherty J. Flaherty	August 2019	47	0.71	6	4	1	.800	6	0	0	0	38.0	19	3	4	2	9	3	0	1	144	1	11.13	2.13	5.22	0.47	32.6	6.3	0.74	.205	0.95	4.50
24	Sonny Gray S. Gray	August 2019	44	0.74	6	4	0	1.000	6	0	0	0	36.2	18	3	4	2	21	2	0	0	150	1	10.80	5.15	2.10	0.49	29.3	14.0	1.06	.198	0.98	4.42
25	Jacob deGrom J. deGrom	April 2021	59	0.51	5	2	2	.500	5	1	1	0	35.0	16	2	5	2	4	0	0	0	123	0	15.17	1.03	14.75	0.51	48.0	3.3	0.57	.241	1.29	4.11