who had the highest single season strikeouts per nine before 1940 with at least 100 innings pitched

Before 1940, Bill Bailey had the best K/9 with 100.0+ innings pitched in a season, with 9.16 per nine innings in 1914.

	NAME	K/9	IP	SEASON	TM	G	W	L	W%	GS	ERA	SO	CG	SHO	SV	H	ER	R	HR	BB	HBP	GF	TBF	WP	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	ERA-	FIP	FIP-	H/9	PRAA
1	Bill Bailey B. Bailey	9.16	128.2	1914	BAL	19	7	9	.438	18	3.08	131	10	1	0	106	44	58	2	68	7	0	536	9	4.76	1.93	0.14	24.4	12.7	1.35	.317	4.06	93	2.35	78	7.41	9.6
2	Bob Feller B. Feller	9.08	148.2	1937	CLE	26	9	7	.563	19	3.39	150	9	0	1	116	56	68	4	106	2	4	651	5	6.42	1.42	0.24	23.0	16.3	1.49	.288	4.12	74	3.55	79	7.02	15.6
3	Hugh Daily H. Daily	8.68	500.2	1884	TOT	58	28	28	.500	58	2.43	483	56	5	0	446	135	268	11	72		0	2,076	50	1.29	6.71	0.20	23.3	3.5	1.03		4.82	81	2.06	79	8.02	27.4
4	Rube Waddell R. Waddell	8.39	324.0	1903	PHA	39	21	16	.568	38	2.44	302	34	4	0	274	88	109	3	85	8	1	1,291	9	2.36	3.55	0.08	23.4	6.6	1.11	.303	3.03	80	1.87	62	7.61	41.9
5	Rube Waddell R. Waddell	8.20	383.0	1904	PHA	46	25	19	.568	46	1.62	349	39	8	0	307	69	109	5	91	14	0	1,496	8	2.14	3.84	0.12	23.3	6.1	1.04	.291	2.56	61	1.59	62	7.21	41.5
6	Matt Kilroy M. Kilroy	7.92	583.0	1886	BAL	68	29	34	.460	68	3.37	513	66	5	0	476	218	350	10	182	19	0	2,469	61	2.81	2.82	0.15	20.8	7.4	1.13	.267	5.40	100	2.60	77	7.35	47
7	Charlie Geggus C. Geggus	7.92	177.1	1884	WSU	23	10	9	.526	21	2.54	156	19	0	0	143	50	100	2	38		2	733	23	1.93	4.11	0.10	21.3	5.2	1.02		5.08	85	2.30	89	7.26	4.8
8	Rube Waddell R. Waddell	7.86	328.2	1905	PHA	46	27	10	.730	34	1.48	287	27	7	0	231	54	86	5	90	10	11	1,257	10	2.46	3.19	0.14	22.8	7.2	0.98	.261	2.35	55	1.89	69	6.33	31.2
9	John Clarkson J. Clarkson	7.78	118.0	1884	CWS	14	10	3	.769	13	2.14	102	12	0	0	94	28	64	10	25		1	478	7	1.91	4.08	0.76	21.3	5.2	1.01		4.88	68	3.28	91	7.17	5.7
10	Bob Feller B. Feller	7.78	277.2	1938	CLE	39	17	11	.607	36	4.08	240	20	2	1	225	126	136	13	208	7	3	1,248	5	6.74	1.15	0.42	19.2	16.7	1.56	.272	4.41	86	4.13	91	7.29	13
11	Joe Krakauskas J. Krakauskas	7.71	121.1	1938	WSH	29	7	5	.583	10	3.12	104	5	1	0	99	42	61	4	88	3	11	551	4	6.53	1.18	0.30	18.9	16.0	1.54	.270	4.52	68	3.89	89	7.34	6.3
12	Rube Marquard R. Marquard	7.68	277.2	1911	NYG	45	24	7	.774	33	2.50	237	22	5	3	221	77	98	9	106	4	6	1,117	10	3.44	2.24	0.29	21.2	9.5	1.18	.279	3.18	75	2.67	77	7.16	24.2
13	Dazzy Vance D. Vance	7.65	308.1	1924	BKN	35	28	6	.824	34	2.16	262	30	3	0	238	74	89	11	77	9	1	1,221	4	2.25	3.40	0.32	21.5	6.3	1.02	.263	2.60	58	2.64	69	6.95	41.3
14	Toad Ramsey T. Ramsey	7.63	588.2	1886	LOU	67	38	27	.585	67	2.45	499	66	3	0	447	160	297	3	207	12	0	2,477	35	3.16	2.41	0.05	20.1	8.4	1.11	.253	4.54	71	2.59	76	6.83	54.7
15	Walter Johnson W. Johnson	7.61	370.0	1910	WSH	45	25	17	.595	42	1.36	313	38	8	1	262	56	92	1	76	13	3	1,367	21	1.85	4.12	0.02	22.9	5.6	0.91	.271	2.24	56	1.39	56	6.37	45.2
16	Joe Wood J. Wood	7.60	145.2	1913	BSA	23	11	5	.688	18	2.29	123	12	1	2	120	37	54	0	61	8	4	586	8	3.77	2.02	0.00	21.0	10.4	1.24	.305	3.34	80	2.29	78	7.41	10.4
17	Joe Wood J. Wood	7.54	275.2	1911	BSA	44	23	17	.575	33	2.02	231	25	5	3	226	62	113	2	76	11	11	1,102	10	2.48	3.04	0.07	21.0	6.9	1.10	.286	3.69	60	2.13	66	7.38	33.5
18	Dazzy Vance D. Vance	7.50	265.1	1925	BKN	31	22	9	.710	31	3.53	221	26	4	0	247	104	115	8	66	10	0	1,089	3	2.24	3.35	0.27	20.3	6.1	1.18	.305	3.90	84	2.70	64	8.38	44.2
19	Dupee Shaw D. Shaw	7.47	543.1	1884	TOT	67	30	33	.476	66	2.30	451	60	5	0	446	139	281	9	109		1	2,244	24	1.81	4.14	0.15	20.1	4.9	1.02		4.65	77	2.43	81	7.39	29
20	Bob Feller B. Feller	7.46	296.2	1939	CLE	39	24	9	.727	35	2.85	246	24	4	1	227	94	105	13	142	3	3	1,243	14	4.31	1.73	0.39	19.8	11.4	1.24	.255	3.19	64	3.35	78	6.89	32.4
21	Dazzy Vance D. Vance	7.46	169.0	1926	BKN	24	9	10	.474	22	3.89	140	12	0	1	172	73	80	7	58	1	2	713	1	3.09	2.41	0.37	19.6	8.1	1.36	.325	4.26	104	2.84	76	9.16	17.2
22	Walter Johnson W. Johnson	7.39	369.0	1912	WSH	50	33	12	.733	37	1.39	303	34	7	2	259	57	89	2	76	16	13	1,413	11	1.85	3.99	0.05	21.4	5.4	0.91	.253	2.17	42	2.03	63	6.32	49.6
23	Rube Waddell R. Waddell	7.33	284.2	1907	PHA	44	19	13	.594	33	2.15	232	20	7	0	234	68	115	2	73	15	5	1,121	4	2.31	3.18	0.06	20.7	6.5	1.08	.290	3.64	83	1.57	65	7.40	27.3
24	Rube Waddell R. Waddell	7.31	285.2	1908	SLA	43	19	14	.576	36	1.89	232	25	5	3	223	60	93	0	90	8	6	1,143	7	2.84	2.58	0.00	20.3	7.9	1.10	.274	2.93	82	1.51	69	7.03	20.7
25	Red Ames R. Ames	7.28	115.0	1904	NYG	16	4	6	.400	13	2.27	93	11	1	3	94	29	44	2	38	3	3	464	6	2.97	2.45	0.16	20.0	8.2	1.15	.280	3.44	83	2.10	75	7.36	9.2