highest era in a season by a player with at least 1 perfect game

Philip Humber has the worst ERA with 1+ perfect games in a season, with an ERA of 6.44 in 2012.

	NAME	ERA	PG	SEASON	TM	G	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	Philip Humber P. Humber	6.44	1	2012	CWS	26	5	5	.500	16	85	1	1	0	102.0	113	73	74	23	44	4	6	1	462	9	7.50	3.88	1.93	2.03	18.4	9.5	1.54	.294	6.53	9.97
2	Domingo Germán D. Germán	4.56	1	2023	NYY	20	5	7	.417	19	114	1	1	0	108.2	83	55	61	20	34	6	1	0	444	2	9.44	2.82	3.35	1.66	25.7	7.7	1.08	.233	5.05	6.87
3	Kenny Rogers K. Rogers	4.46	1	1994	TEX	24	11	8	.579	24	120	6	2	0	167.1	169	83	93	24	52	3	0	1	714	3	6.45	2.80	2.31	1.29	16.8	7.3	1.32	.282	5.00	9.09
4	Len Barker L. Barker	3.91	1	1981	CLE	22	8	7	.533	22	127	9	3	0	154.1	150	67	72	7	46	1	0	0	660	5	7.41	2.68	2.76	0.41	19.2	7.0	1.27	.299	4.20	8.75
5	Mark Buehrle M. Buehrle	3.84	1	2009	CWS	33	13	10	.565	33	105	1	1	0	213.1	222	91	97	27	45	5	0	3	874	2	4.43	1.90	2.33	1.14	12.0	5.1	1.25	.282	4.09	9.37
6	Charlie Robertson C. Robertson	3.64	1	1922	CWS	37	14	15	.483	34	84	21	3	0	272.0	294	110	124	9	90	5	2		1,169	0	2.78	2.98	0.93	0.30	7.2	7.7	1.41	.291	4.10	9.73
7	Dallas Braden D. Braden	3.50	1	2010	OAK	30	11	14	.440	30	113	5	2	0	192.2	180	75	83	17	43	5	0	0	781	2	5.28	2.01	2.63	0.79	14.5	5.5	1.16	.270	3.88	8.41
8	David Wells D. Wells	3.49	1	1998	NYY	30	18	4	.818	30	163	8	5	0	214.1	195	83	86	29	29	1	0	0	851	2	6.84	1.22	5.62	1.22	19.2	3.4	1.05	.264	3.61	8.19
9	Mike Witt M. Witt	3.47	1	1984	CAL	34	15	11	.577	34	196	9	2	0	246.2	227	95	103	17	84	5	0	3	1,032	7	7.15	3.06	2.33	0.62	19.0	8.1	1.26	.288	3.76	8.28
10	David Cone D. Cone	3.44	1	1999	NYY	31	12	9	.571	31	177	1	1	0	193.1	164	74	84	21	90	11	0	2	827	7	8.24	4.19	1.97	0.98	21.4	10.9	1.31	.271	3.91	7.63
11	Tom Browning T. Browning	3.41	1	1988	CIN	36	18	5	.783	36	124	5	2	0	250.2	205	95	98	36	64	7	0	3	1,001	2	4.45	2.30	1.94	1.29	12.4	6.4	1.07	.219	3.52	7.36
12	Catfish Hunter C. Hunter	3.35	1	1968	OAK	36	13	13	.500	34	172	11	2	1	234.0	210	87	99	29	69	4	2	10	968	0	6.62	2.65	2.49	1.12	17.8	7.1	1.19	.261	3.81	8.08
13	Felix Hernandez F. Hernandez	3.06	1	2012	SEA	33	13	9	.591	33	223	5	5	0	232.0	209	79	84	14	56	12	0	0	939	13	8.65	2.17	3.98	0.54	23.7	6.0	1.14	.308	3.26	8.11
14	Matt Cain M. Cain	2.79	1	2012	SFG	32	16	5	.762	32	193	2	2	0	219.1	177	68	73	21	51	9	0	1	876	8	7.92	2.09	3.78	0.86	22.0	5.8	1.04	.259	3.00	7.26
15	Jim Bunning J. Bunning	2.63	1	1964	PHI	41	19	8	.704	39	219	13	5	2	284.1	248	83	99	23	46	14	2	3	1,145	2	6.93	1.46	4.76	0.73	19.1	4.0	1.03	.267	3.13	7.85
16	Randy Johnson R. Johnson	2.60	1	2004	ARI	35	16	14	.533	35	290	4	2	0	245.2	177	71	88	18	44	10	0	1	964	3	10.62	1.61	6.59	0.66	30.1	4.6	0.90	.264	3.22	6.48
17	Roy Halladay R. Halladay	2.44	1	2010	PHI	33	21	10	.677	33	219	9	4	0	250.2	231	68	74	24	30	6	0	1	993	5	7.86	1.08	7.30	0.86	22.1	3.0	1.04	.290	2.66	8.29
18	Dennis Martinez D. Martinez	2.39	1	1991	MON	31	14	11	.560	31	123	9	5	0	222.0	187	59	70	9	62	4	0	3	905	3	4.99	2.51	1.98	0.36	13.6	6.9	1.12	.252	2.84	7.58
19	Sandy Koufax S. Koufax	2.04	1	1965	LAD	43	26	8	.765	41	382	27	8	2	335.2	216	76	90	26	71	5	2	4	1,297	11	10.24	1.90	5.38	0.70	29.5	5.5	0.86	.234	2.41	5.79