which pitcher had the lowest era in a season in which he lost 20 games

Ed Walsh has the lowest ERA with 20+ pitcher losses in a season, with an ERA of 1.27 in 1910.

Interpreted as:

Which pitcher had the lowest era in a season in which he lost 20 or more games?

	NAME	ERA	L	SEASON	TM	W	L%	G	W%	GS	SO	CG	SHO	SV	IP	H	ER	R	HR	BB	HBP	GF	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	ERA-	FIP	FIP-	H/9	PRAA
1	Ed Walsh E. Walsh	1.27	20	1910	CWS	18	.526	45	.474	36	258	33	7	5	369.2	242	52	87	5	61	4	7	1,359	6	6.28	1.49	4.23	0.12	19.0	4.5	0.82	.230	2.12	52	1.63	66	5.89	34.8
2	Jim Devlin J. Devlin	1.56	35	1876	LOU	30	.538	68	.462	68	122	66	5	0	622.0	566	108	309	3	37		0	2,568	14	1.77	0.54	3.30	0.04	4.8	1.4	0.97		4.47	62	2.08	82	8.19	50.7
3	Silver King S. King	1.63	20	1888	STL	45	.308	66	.692	64	258	64	6	0	584.2	435	106	203	6	76	30	1	2,291	23	3.97	1.17	3.39	0.09	11.3	3.3	0.87	.223	3.12	50	2.38	76	6.70	55
4	John Ward J. Ward	1.74	24	1880	PRO	39	.381	70	.619	67	230	59	8	1	595.0	501	115	230	5	45		4	2,351	19	3.48	0.68	5.11	0.08	9.8	1.9	0.92		3.48	76	2.10	91	7.58	9.3
5	Will White W. White	1.79	21	1878	CIN	30	.412	52	.588	52	169	52	5	0	468.0	477	93	249	1	45		0	1,939	40	3.25	0.87	3.76	0.02	8.7	2.3	1.12		4.79	82	2.13	97	9.17	-4.6
6	Guy Hecker G. Hecker	1.80	20	1884	LOU	52	.278	75	.722	73	385	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
7	Jim McCormick J. McCormick	1.85	28	1880	CLE	45	.384	74	.616	74	260	72	7	0	657.2	585	135	274	2	75		0	2,669	21	3.56	1.03	3.47	0.03	9.7	2.8	1.00		3.75	81	2.12	93	8.01	4.6
8	Kaiser Wilhelm K. Wilhelm	1.87	22	1908	BKN	16	.579	42	.421	36	99	33	6	0	332.0	266	69	105	3	83	6	3	1,312	5	2.68	2.25	1.19	0.08	7.5	6.3	1.05	.235	2.85	84	2.43	102	7.21	-4.2
9	Tony Mullane T. Mullane	1.88	24	1882	LOU	30	.444	55	.556	55	170	51	5	0	460.1	418	96	212	3	78		0	1,927	33	3.32	1.52	2.18	0.06	8.8	4.0	1.08		4.14	71	2.62	95	8.17	4.5
10	Walter Johnson W. Johnson	1.90	20	1916	WSH	25	.444	48	.556	38	228	36	3	1	369.2	290	78	105	0	82	9	10	1,410	9	5.55	2.00	2.78	0.00	16.2	5.8	1.01	.266	2.56	68	1.82	65	7.06	39.7
11	Jim Scott J. Scott	1.90	21	1913	CWS	20	.512	48	.488	38	158	25	4	1	312.1	252	66	96	2	86	9	6	1,225	2	4.55	2.48	1.84	0.06	12.9	7.0	1.08	.258	2.77	67	2.54	87	7.26	12.1
12	Sam Weaver S. Weaver	1.95	31	1878	MIL	12	.721	45	.279	43	95	39	1	0	383.0	371	83	214	2	21		2	1,589	25	2.23	0.49	4.52	0.05	6.0	1.3	1.02		5.03	79	2.27	92	8.72	15.6
13	Harry Howell H. Howell	1.98	22	1905	SLA	15	.595	38	.405	37	198	35	4	0	323.0	252	71	109	2	101	12	1	1,275	9	5.52	2.81	1.96	0.06	15.5	7.9	1.09	.260	3.04	78	2.43	93	7.02	4.9
14	Will White W. White	1.99	31	1879	CIN	43	.419	76	.581	75	232	75	4	0	680.0	676	150	404	10	68		1	2,906	49	3.07	0.90	3.41	0.13	8.0	2.3	1.09		5.35	84	2.55	107	8.95	-25.2
15	Pud Galvin P. Galvin	1.99	22	1884	BUF	46	.324	72	.676	72	369	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
16	Bugs Raymond B. Raymond	2.03	25	1908	SLN	15	.625	48	.375	37	145	23	5	2	324.1	236	73	116	2	95	14	8	1,247	9	4.02	2.64	1.53	0.06	11.6	7.6	1.02	.236	3.22	87	2.30	93	6.55	5.9
17	Old Hoss Radbourn O. Hoss Radbourn	2.05	25	1883	PRO	48	.342	76	.658	68	315	66	4	1	632.1	563	144	275	7	56		8	2,540	36	4.48	0.80	5.63	0.10	12.4	2.2	0.98		3.91	68	2.67	88	8.01	17.8
18	Will White W. White	2.09	22	1883	CIN	43	.338	65	.662	65	141	64	6	0	577.0	473	134	255	16	104		0	2,367	25	2.20	1.62	1.36	0.25	6.0	4.4	1.00		3.98	63	3.66	111	7.38	-23.9
19	Terry Larkin T. Larkin	2.14	25	1877	HAR	29	.463	56	.537	56	96	55	4	0	501.0	510	119	285	2	53		0	2,132	18	1.72	0.95	1.81	0.04	4.5	2.5	1.12		5.12	83	2.82	109	9.16	-28.5
20	Will White W. White	2.14	42	1880	CIN	18	.700	62	.300	62	161	58	3	0	517.1	550	123	323	9	56		0	2,217	35	2.80	0.97	2.88	0.16	7.3	2.5	1.17		5.62	89	2.46	103	9.57	-2.2
21	Lee Richmond L. Richmond	2.15	32	1880	WOR	32	.500	74	.500	66	243	57	5	3	590.2	541	141	278	7	74		9	2,410	29	3.70	1.13	3.28	0.11	10.1	3.1	1.04		4.24	85	2.24	88	8.24	28.7
22	Guy Hecker G. Hecker	2.17	23	1885	LOU	30	.434	53	.566	53	209	51	2	0	480.0	454	116	252	6	54	18	0	1,988	16	3.92	1.01	3.87	0.11	10.5	2.7	1.06	.263	4.73	67	2.62	86	8.51	22.2
23	Harry Howell H. Howell	2.19	21	1904	SLA	13	.618	34	.382	33	122	32	2	0	299.2	254	73	99	1	60	13	0	1,175	1	3.66	1.80	2.03	0.03	10.4	5.1	1.05	.258	2.97	88	2.38	99	7.63	-0.5
24	Vic Willis V. Willis	2.20	20	1902	BSN	27	.426	51	.574	46	225	45	4	3	410.0	372	100	142	6	101	14	5	1,652	12	4.94	2.22	2.23	0.13	13.6	6.1	1.15	.280	3.12	76	2.60	86	8.17	21.3
25	Old Hoss Radbourn O. Hoss Radbourn	2.20	21	1885	PRO	28	.429	49	.571	49	154	49	2	0	445.2	423	109	209	4	83		0	1,841	34	3.11	1.68	1.86	0.08	8.4	4.5	1.14		4.22	81	2.87	99	8.54	-2.7