players with the best era as a pitcher in a season with the minnesota twins since 1920 with a minimum of 1 inning pitched per team game

Since 1920, Roger Wolff has the lowest ERA for the Washington Senators when he has had 1 or more (IP/TM GMS) in a season, with an ERA of 2.12 in 1945.

	NAME	ERA	IP	TM GMS	IP/TM GMS	SEASON	TM	G	W	L	W%	GS	SO	CG	SHO	SV	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	Roger Wolff R. Wolff	2.12	250.0	156	1.6	1945	WSH	33	20	10	.667	29	108	21	4	2	200	59	68	7	53	1	4		1,000	1	3.89	1.91	2.04	0.25	10.8	5.3	1.01	.232	2.45	66	2.69	81	7.20	17.7
2	Dutch Leonard D. Leonard	2.13	216.0	156	1.38	1945	WSH	31	17	7	.708	29	96	12	4	1	208	51	72	5	35	2	1		885	2	4.00	1.46	2.74	0.21	10.8	4.0	1.13	.272	3.00	66	2.47	74	8.67	20.9
3	Mickey Haefner M. Haefner	2.29	165.1	153	1.08	1943	WSH	36	11	5	.688	13	65	8	1	6	126	42	56	4	60	4	17		679	3	3.54	3.27	1.08	0.22	9.6	8.8	1.13	.223	3.05	72	3.11	95	6.86	2.7
4	Johnny Niggeling J. Niggeling	2.32	206.0	154	1.34	1944	WSH	24	10	8	.556	24	121	14	2	0	164	53	65	5	88	4	0		848	5	5.29	3.84	1.38	0.22	14.3	10.4	1.22	.252	2.84	70	3.02	92	7.17	5.7
5	Allan Anderson A. Anderson	2.45	202.1	162	1.25	1988	MIN	30	16	9	.640	30	83	3	1	0	199	55	70	14	37	7	0	1	815	1	3.69	1.65	2.24	0.62	10.2	4.5	1.17	.274	3.11	59	3.49	88	8.85	10.4
6	Camilo Pascual C. Pascual	2.46	248.1	161	1.54	1963	MIN	31	21	9	.700	31	202	18	3	0	205	68	76	21	81	3	0	4	1,011	10	7.32	2.94	2.49	0.76	20.0	8.0	1.15	.261	2.75	67	2.97	80	7.43	20.7
7	Dave Goltz D. Goltz	2.49	220.1	162	1.36	1978	MIN	29	15	10	.600	29	116	13	2	0	209	61	72	12	67	1	0	1	913	4	4.74	2.74	1.73	0.49	12.7	7.3	1.25	.275	2.94	65	3.15	83	8.54	15.8
8	Milo Candini M. Candini	2.49	166.0	153	1.08	1943	WSH	28	11	7	.611	21	67	8	3	1	144	46	55	3	65	1	5		681	5	3.63	3.52	1.03	0.16	9.8	9.5	1.26	.259	2.98	78	3.04	93	7.81	4
9	Garland Braxton G. Braxton	2.51	218.1	155	1.41	1928	WSH	38	13	11	.542	24	94	15	2	6	177	61	78	7	44	5	10		875	2	3.87	1.81	2.14	0.29	10.7	5.0	1.01	.234	3.22	63	3.13	81	7.30	17.9
10	Bert Blyleven B. Blyleven	2.52	325.0	162	2.01	1973	MIN	40	20	17	.541	40	258	25	9	0	296	91	109	16	67	9	0	4	1,321	7	7.14	1.86	3.85	0.44	19.5	5.1	1.12	.288	3.02	63	2.31	58	8.20	57.6
11	Dean Chance D. Chance	2.53	292.0	162	1.8	1968	MIN	43	16	16	.500	39	234	15	6	1	224	82	96	15	63	10	3	8	1,161	12	7.21	1.94	3.71	0.46	20.2	5.4	0.98	.249	2.96	82	2.20	68	6.90	33
12	Jim Merritt J. Merritt	2.53	227.2	164	1.39	1967	MIN	37	13	7	.650	28	161	11	4	0	196	64	72	21	30	7	4	6	911	10	6.36	1.19	5.37	0.83	17.7	3.3	0.99	.253	2.85	75	2.81	81	7.75	16.8
13	Jim Perry J. Perry	2.54	184.1	162	1.14	1966	MIN	33	11	7	.611	25	122	8	1	0	149	52	61	17	53	5	2	4	742	6	5.96	2.59	2.30	0.83	16.4	7.1	1.10	.242	2.98	71	3.37	91	7.27	6.7
14	Johan Santana J. Santana	2.61	228.0	162	1.41	2004	MIN	34	20	6	.769	34	265	1	1	0	156	66	70	24	54	9	0	0	881	7	10.46	2.13	4.91	0.95	30.1	6.1	0.92	.250	2.76	56	2.91	66	6.16	38.1
15	Ray Corbin R. Corbin	2.62	161.2	154	1.05	1972	MIN	31	8	9	.471	19	83	5	3	0	135	47	56	12	53	6	5	3	657	2	4.62	2.95	1.57	0.67	12.6	8.1	1.16	.245	3.12	84	3.43	105	7.52	-2.8
16	Lee Stange L. Stange	2.62	164.2	161	1.02	1963	MIN	32	12	5	.706	20	100	7	2	0	145	48	53	21	43	0	2	1	674	10	5.47	2.35	2.33	1.15	14.8	6.4	1.14	.243	2.90	71	3.71	100	7.93	0.5
17	Jim Perry J. Perry	2.63	167.2	162	1.03	1965	MIN	36	12	7	.632	19	88	4	2	0	142	49	57	18	47	3	3	2	679	4	4.72	2.52	1.87	0.97	13.0	6.9	1.13	.237	3.06	74	3.76	102	7.62	-1.1
18	Camilo Pascual C. Pascual	2.64	238.2	154	1.55	1959	WSH	32	17	10	.630	30	185	17	6	0	202	70	80	10	69	3	1	7	984	5	6.98	2.60	2.68	0.38	18.8	7.0	1.14	.268	3.02	67	2.44	61	7.62	41.3
19	Frank Viola F. Viola	2.64	255.1	162	1.58	1988	MIN	35	24	7	.774	35	193	7	2	0	236	75	80	20	54	3	0	2	1,031	5	6.80	1.90	3.57	0.70	18.7	5.2	1.14	.284	2.82	64	2.94	74	8.32	28.7
20	Bert Blyleven B. Blyleven	2.66	281.0	163	1.72	1974	MIN	37	17	17	.500	37	249	19	3	0	244	83	99	14	77	9	0	3	1,149	3	7.98	2.47	3.23	0.45	21.7	6.7	1.14	.288	3.17	71	2.36	65	7.81	39.4
21	Kenta Maeda K. Maeda	2.70	66.2	60	1.11	2020	MIN	11	6	1	.857	11	80	0	0	0	40	20	20	9	10	0	0	0	248	0	10.80	1.35	8.00	1.21	32.3	4.0	0.75	.208	2.70	62	2.99	68	5.40	10.5
22	Dick Woodson D. Woodson	2.72	251.2	154	1.63	1972	MIN	36	14	14	.500	36	150	9	3	0	193	76	93	19	101	2	0	5	1,033	4	5.36	3.61	1.49	0.68	14.5	9.8	1.17	.229	3.33	87	3.41	105	6.90	-4
23	Walter Johnson W. Johnson	2.72	277.2	156	1.78	1924	WSH	38	23	7	.767	38	158	20	6	0	233	84	97	10	77	10	0		1,148	4	5.12	2.50	2.05	0.32	13.8	6.7	1.12	.250	3.14	67	3.31	83	7.55	20.5
24	Bob Porterfield B. Porterfield	2.72	231.1	157	1.47	1952	WSH	31	13	14	.481	29	80	15	3	0	222	70	80	7	85	4	2		973	2	3.11	3.31	0.94	0.27	8.2	8.7	1.33	.270	3.11	76	3.25	90	8.64	9.7
25	Bert Blyleven B. Blyleven	2.73	287.1	154	1.87	1972	MIN	39	17	17	.500	38	228	11	3	0	247	87	93	22	69	10	1	7	1,158	7	7.14	2.16	3.30	0.69	19.7	6.0	1.10	.271	2.91	87	2.63	81	7.74	20