most strikeouts in a season with a 2 era or lower

Old Hoss Radbourn has struck out the most batters with an ERA of 2.00 or better in a season, with 441 strikeouts in 1884.

Interpreted as:

most strikeouts by a player in a season with a 2 era or lower

	NAME	SO	ERA	SEASON	TM	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	ERA-	FIP	FIP-	H/9	PRAA
1	Old Hoss Radbourn O. Hoss Radbourn	441	1.38	1884	PRO	75	59	12	.831	73	73	11	2	678.2	528	104	216	18	98		2		2,672	34	5.85	1.30	4.50	0.24	16.5	3.7	0.92		2.86	48	2.75	84	7.00	31.9
2	Guy Hecker G. Hecker	385	1.80	1884	LOU	75	52	20	.722	73	72	6	0	670.2	526	134	230	4	56	16	2		2,649	27	5.17	0.75	6.88	0.05	14.5	2.1	0.87	.239	3.09	57	2.53	80	7.06	43
3	Pud Galvin P. Galvin	369	1.99	1884	BUF	72	46	22	.676	72	71	12	0	636.1	566	141	254	23	63		0		2,554	16	5.22	0.89	5.86	0.33	14.4	2.5	0.99		3.59	64	2.88	82	8.01	50.9
4	Rube Waddell R. Waddell	349	1.62	1904	PHA	46	25	19	.568	46	39	8	0	383.0	307	69	109	5	91	14	0		1,496	8	8.20	2.14	3.84	0.12	23.3	6.1	1.04	.291	2.56	61	1.59	62	7.21	41.5
5	Charlie Sweeney C. Sweeney	337	1.70	1884	TOT	60	41	15	.732	56	53	6	1	492.0	360	93	182	6	42		4		1,909	21	6.16	0.77	8.02	0.11	17.7	2.2	0.82		3.33	58	2.32	81	6.59	26.9
6	Tim Keefe T. Keefe	335	1.74	1888	NYG	51	35	12	.745	51	48	8	0	434.1	317	84	143	5	90	12	0		1,723	21	6.94	1.86	3.72	0.10	19.4	5.2	0.94	.244	2.96	63	1.90	66	6.57	45.3
7	Sandy Koufax S. Koufax	317	1.73	1966	LAD	41	27	9	.750	41	27	5	0	323.0	241	62	74	19	77	0	0	4	1,274	7	8.83	2.15	4.12	0.53	24.9	6.0	0.98	.258	2.06	53	2.07	65	6.72	41.8
8	Walter Johnson W. Johnson	313	1.36	1910	WSH	45	25	17	.595	42	38	8	1	370.0	262	56	92	1	76	13	3		1,367	21	7.61	1.85	4.12	0.02	22.9	5.6	0.91	.271	2.24	56	1.39	56	6.37	45.2
9	Steve Carlton S. Carlton	310	1.97	1972	PHI	41	27	10	.730	41	30	8	0	346.1	257	76	84	17	87	1	0	8	1,351	8	8.06	2.26	3.56	0.44	22.9	6.4	0.99	.256	2.18	56	2.00	59	6.68	53.5
10	John Clarkson J. Clarkson	308	1.85	1885	CWS	70	53	16	.768	70	68	10	0	623.0	497	128	255	21	97		0		2,487	14	4.45	1.40	3.18	0.30	12.4	3.9	0.95		3.68	61	2.80	86	7.18	38.8
11	Sandy Koufax S. Koufax	306	1.88	1963	LAD	40	25	5	.833	40	20	11	0	311.0	214	65	68	18	58	3	0	7	1,210	6	8.86	1.68	5.28	0.52	25.3	4.8	0.87	.238	1.97	62	1.85	62	6.19	41.9
12	Pedro Martinez P. Martinez	305	1.90	1997	MON	31	17	8	.680	31	13	4	0	241.1	158	51	65	16	67	9	0	5	947	3	11.37	2.50	4.55	0.60	32.2	7.1	0.93	.258	2.42	45	2.38	57	5.89	49
13	Walter Johnson W. Johnson	303	1.39	1912	WSH	50	33	12	.733	37	34	7	2	369.0	259	57	89	2	76	16	13		1,413	11	7.39	1.85	3.99	0.05	21.4	5.4	0.91	.253	2.17	42	2.03	63	6.32	49.6
14	Vida Blue V. Blue	301	1.82	1971	OAK	39	24	8	.750	39	24	8	0	312.0	209	63	73	19	88	4	0	3	1,207	10	8.68	2.54	3.42	0.55	24.9	7.3	0.95	.239	2.11	56	2.19	66	6.03	41.4
15	Tom Seaver T. Seaver	289	1.76	1971	NYM	36	20	10	.667	35	21	4	0	286.1	210	56	61	18	61	4	1	2	1,103	5	9.08	1.92	4.74	0.57	26.2	5.5	0.95	.263	1.92	52	1.93	58	6.60	44.5
16	Rube Waddell R. Waddell	287	1.48	1905	PHA	46	27	10	.730	34	27	7	0	328.2	231	54	86	5	90	10	11		1,257	10	7.86	2.46	3.19	0.14	22.8	7.2	0.98	.261	2.35	55	1.89	69	6.33	31.2
17	Pedro Martinez P. Martinez	284	1.74	2000	BOS	29	18	6	.750	29	7	4	0	217.0	128	42	44	17	32	14	0	0	817	1	11.78	1.33	8.88	0.71	34.8	3.9	0.74	.236	1.82	35	2.16	47	5.31	61.5
18	Sam McDowell S. McDowell	283	1.81	1968	CLE	38	15	14	.517	37	11	3	0	269.0	181	54	78	13	110	10	0	9	1,098	7	9.47	3.68	2.57	0.43	25.8	10.0	1.08	.246	2.61	59	2.25	70	6.06	28.3
19	Denny McLain D. McLain	280	1.96	1968	DET	41	31	6	.838	41	28	6	0	336.0	241	73	86	31	63	6	0	2	1,288	3	7.50	1.69	4.44	0.83	21.7	4.9	0.90	.231	2.30	64	2.53	79	6.46	24.8
20	Hal Newhouser H. Newhouser	275	1.94	1946	DET	37	26	9	.743	34	29	6	1	292.2	215	63	77	10	98	1	2		1,176	8	8.46	3.01	2.81	0.31	23.4	8.3	1.07	.259	2.37	54	1.96	56	6.61	49.6
21	Jacob deGrom J. deGrom	269	1.70	2018	NYM	32	10	9	.526	32	1	0	0	217.0	152	41	48	10	46	5	0	3	835	2	11.16	1.91	5.85	0.41	32.2	5.5	0.91	.281	1.99	44	1.98	50	6.30	49
22	Ed Walsh E. Walsh	269	1.42	1908	CWS	66	40	15	.727	49	42	11	6	464.0	343	73	111	2	56	9	16		1,755	10	5.22	1.09	4.80	0.04	15.3	3.2	0.86	.240	2.15	63	1.42	67	6.65	34.2
23	Dwight Gooden D. Gooden	268	1.53	1985	NYM	35	24	4	.857	35	16	8	0	276.2	198	47	51	13	69	2	0	4	1,065	6	8.72	2.24	3.88	0.42	25.2	6.5	0.97	.259	1.66	44	2.12	59	6.44	45.6
24	Bob Gibson B. Gibson	268	1.12	1968	STL	34	22	9	.710	34	28	13	0	304.2	198	38	49	11	62	7	0	6	1,161	4	7.92	1.83	4.32	0.32	23.1	5.3	0.85	.230	1.45	38	1.77	63	5.85	34.8
25	Larry Corcoran L. Corcoran	268	1.95	1880	CWS	63	43	14	.754	60	57	4	2	536.1	404	116	218	6	99		3		2,133	19	4.50	1.66	2.71	0.10	12.6	4.6	0.94		3.66	80	2.23	91	6.78	16.5