which left handed sp had the best era in world series career ever, at least 3 games

Madison Bumgarner had the lowest ERA by a left-handed starting pitcher in the World Series when pitching in 3+ games, with an ERA of 0.29.

	NAME	ERA	G	SERIES	W	L	W%	GS	SO	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	Madison Bumgarner M. Bumgarner	0.29	4	World Series	4	0	1.000	4	27	1	1	0	31.0	12	1	1	1	5	2	0	0	107	0	7.84	1.45	5.40	0.29	25.2	4.7	0.55	.153	0.29	3.48
2	Harry Brecheen H. Brecheen	0.67	3	World Series	3	0	1.000	3	14	3	1	0	27.0	20	2	2	0	9	0	0	1	103	0	4.67	3.00	1.56	0.00	13.6	8.7	1.07	.250	0.67	6.67
3	Claude Osteen C. Osteen	0.86	3	World Series	1	2	.333	3	7	1	1	0	21.0	12	2	3	2	6	0	0	0	77	0	3.00	2.57	1.17	0.86	9.1	7.8	0.86	.161	1.29	5.14
4	Babe Ruth B. Ruth	0.87	3	World Series	3	0	1.000	3	8	2	1	0	31.0	19	3	3	1	10	1	0	0	116	1	2.32	2.90	0.80	0.29	6.9	8.6	0.94	.188	0.87	5.52
5	Sherry Smith S. Smith	0.89	3	World Series	1	2	.333	3	5	3	0	0	30.1	17	3	4	0	9	0	0	1	110	0	1.48	2.67	0.56	0.00	4.5	8.2	0.86	.177	1.19	5.04
6	Sandy Koufax S. Koufax	0.98	7	World Series	4	3	.571	7	60	4	2	0	55.0	36	6	10	2	11	0	0	1	207	0	9.82	1.80	5.45	0.33	29.0	5.3	0.85	.254	1.64	5.89
7	Hippo Vaughn H. Vaughn	1.00	3	World Series	1	2	.333	3	17	3	1	0	27.0	17	3	3	0	5	1	0	1	97	0	5.67	1.67	3.40	0.00	17.5	5.2	0.81	.230	1.00	5.67
8	Eddie Plank E. Plank	1.17	6	World Series	2	4	.333	6	32	6	0	0	54.0	36	7	10	0	11	4	0	1	211	1	5.33	1.83	2.91	0.00	15.2	5.2	0.87	.220	1.67	6.00
9	Bill Hallahan B. Hallahan	1.21	5	World Series	3	1	.750	5	26	3	2	0	37.1	27	5	5	0	20	1	0	1	160	1	6.27	4.82	1.30	0.00	16.3	12.5	1.26	.239	1.21	6.51
10	Jon Lester J. Lester	1.65	5	World Series	4	1	.800	5	30	0	0	0	32.2	22	6	6	3	7	1	0	0	124	0	8.27	1.93	4.29	0.83	24.2	5.6	0.89	.229	1.65	6.06
11	Mickey Lolich M. Lolich	1.67	3	World Series	3	0	1.000	3	21	3	0	0	27.0	20	5	5	2	6	1	0	0	104	0	7.00	2.00	3.50	0.67	20.2	5.8	0.96	.243	1.67	6.67
12	Ron Guidry R. Guidry	1.69	4	World Series	3	1	.750	4	26	2	0	0	32.0	20	6	6	4	14	0	0	0	125	0	7.31	3.94	1.86	1.13	20.8	11.2	1.06	.198	1.69	5.63
13	Carl Hubbell C. Hubbell	1.79	6	World Series	4	2	.667	6	32	4	0	0	50.1	40	10	18	3	12	1	0	2	204	1	5.72	2.15	2.67	0.54	15.7	5.9	1.03	.237	3.22	7.15
14	Rich Hill R. Hill	1.80	3	World Series	0	0		3	19	0	0	0	15.0	8	3	3	1	7	1	0	2	61	0	11.40	4.20	2.71	0.60	31.1	11.5	1.00	.212	1.80	4.80
15	Lefty Tyler L. Tyler	1.91	4	World Series	1	1	.500	4	8	1	0	0	33.0	22	7	9	0	14	0	0	1	133	0	2.18	3.82	0.57	0.00	6.0	10.5	1.09	.198	2.45	6.00
16	Steve Carlton S. Carlton	1.95	4	World Series	2	2	.500	4	29	0	0	0	27.2	22	6	9	1	14	0	0	0	115	3	9.43	4.55	2.07	0.33	25.2	12.2	1.30	.296	2.93	7.16
17	Bruce Hurst B. Hurst	1.96	3	World Series	2	0	1.000	3	17	1	0	0	23.0	18	5	5	1	6	0	0	0	91	0	6.65	2.35	2.83	0.39	18.7	6.6	1.04	.254	1.96	7.04
18	Art Nehf A. Nehf	1.98	9	World Series	4	4	.500	9	28	6	2	0	77.1	48	17	21	1	31	1	0	2	301	2	3.26	3.61	0.90	0.12	9.3	10.3	1.02	.196	2.44	5.59
19	Tommy Byrne T. Byrne	2.04	3	World Series	1	1	.500	3	9	1	0	0	17.2	10	4	5	1	10	1	0	1	70	0	4.58	5.09	0.90	0.51	12.9	14.3	1.13	.184	2.55	5.09
20	Herb Pennock H. Pennock	2.05	5	World Series	5	0	1.000	5	16	4	0	0	44.0	31	10	10	2	5	0	0	0	165	0	3.27	1.02	3.20	0.41	9.7	3.0	0.82	.204	2.05	6.34
21	Max Lanier M. Lanier	2.05	4	World Series	1	1	.500	4	23	0	0	0	26.1	19	6	8	1	9	0	0	1	108	2	7.86	3.08	2.56	0.34	21.3	8.3	1.06	.240	2.73	6.49
22	Lefty Grove L. Grove	2.09	5	World Series	3	2	.600	5	24	4	0	0	43.0	42	10	12	0	4	0	0	0	175	0	5.02	0.84	6.00	0.00	13.7	2.3	1.07	.286	2.51	8.79
23	Johnny Podres J. Podres	2.11	6	World Series	4	1	.800	6	18	2	1	0	38.1	29	9	14	3	13	2	0	0	157	0	4.23	3.05	1.38	0.70	11.5	8.3	1.10	.215	3.29	6.81
24	Scott McGregor S. McGregor	2.12	4	World Series	2	2	.500	4	20	2	1	0	34.0	25	8	8	3	4	0	0	2	129	0	5.29	1.06	5.00	0.79	15.5	3.1	0.85	.216	2.12	6.62
25	Tom Glavine T. Glavine	2.16	8	World Series	4	3	.571	8	38	3	0	0	58.1	33	14	18	8	20	0	0	0	223	1	5.86	3.09	1.90	1.23	17.0	9.0	0.91	.159	2.78	5.09