highest single season era minimum 10 start

Brian Matusz has the highest ERA with 10+ starts in a season, with an ERA of 10.69 in 2011.

Interpreted as:

highest single season era by a player minimum 10 start

	NAME	ERA	GS	SEASON	TM	G	W	L	W%	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	ERA-	FIP	FIP-	H/9	PRAA
1	Brian Matusz B. Matusz	10.69	12	2011	BAL	12	1	9	.100	38	0	0	0	49.2	81	59	60	18	24	0	0	1	245	0	6.89	4.35	1.58	3.26	15.5	9.8	2.11	.382	10.87	255	7.65	182	14.68	-18.2
2	Roy Halladay R. Halladay	10.64	13	2000	TOR	19	4	7	.364	44	0	0	0	67.2	107	80	87	14	42	2	4	0	349	6	5.85	5.59	1.05	1.86	12.6	12.0	2.20	.377	11.57	212	6.47	134	14.23	-12.3
3	Charlie Stecher C. Stecher	10.32	10	1890	PHA	10	0	10	.000	18	9	0	0	68.0	111	78	110	1	60	14	0		386	12	2.38	7.94	0.30	0.13	4.7	15.5	2.51	.375	14.56	267	5.84	161	14.69	-16.7
4	Micah Bowie M. Bowie	10.24	11	1999	TOT	14	2	7	.222	41	0	0	0	51.0	81	58	60	9	34	2	2	2	265	4	7.24	6.00	1.21	1.59	15.5	12.8	2.25	.402	10.59	225	5.93	127	14.29	-7.1
5	Aaron Myette A. Myette	10.06	12	2002	TEX	15	2	5	.286	48	0	0	0	48.1	64	54	57	11	41	6	2	0	249	5	8.94	7.63	1.17	2.05	19.3	16.5	2.17	.371	10.61	213	6.84	152	11.92	-12.2
6	Steve Blass S. Blass	9.85	18	1973	PIT	23	3	9	.250	27	1	0	0	88.2	109	97	98	11	84	12	1	4	455	9	2.74	8.53	0.32	1.12	5.9	18.5	2.18	.305	9.95	277	6.81	191	11.06	-33.1
7	Sean Bergman S. Bergman	9.66	14	2000	MIN	15	4	5	.444	35	0	0	0	68.0	111	73	76	18	33	2	0	1	337	2	4.63	4.37	1.06	2.38	10.4	9.8	2.12	.373	10.06	193	7.08	150	14.69	-18.2
8	Andy Larkin A. Larkin	9.64	14	1998	FLA	17	3	8	.273	43	0	0	0	74.2	101	80	87	12	55	4	0	3	373	3	5.18	6.63	0.78	1.45	11.5	14.7	2.09	.344	10.49	237	6.44	153	12.17	-18.9
9	Edwin Jackson E. Jackson	9.58	13	2019	TOT	18	3	10	.231	52	0	0	0	67.2	105	72	81	23	32	3	0	0	336	6	6.92	4.26	1.63	3.06	15.5	9.5	2.02	.363	10.77	209	7.64	166	13.97	-22.8
10	Alfredo Simon A. Simon	9.36	11	2016	CIN	15	2	7	.222	39	0	0	0	58.2	89	61	64	15	31	8	1	2	298	3	5.98	4.76	1.26	2.30	13.1	10.4	2.05	.361	9.82	220	7.13	168	13.65	-18.2
11	Edgar Gonzalez E. Gonzalez	9.32	10	2004	ARI	10	0	9	.000	31	0	0	0	46.1	72	48	49	15	18	5	0	4	228	3	6.02	3.50	1.72	2.91	13.6	7.9	1.94	.358	9.52	204	7.40	163	13.99	-14.3
12	Dallas Keuchel D. Keuchel	9.20	14	2022	TOT	14	2	9	.182	45	0	0	0	60.2	94	62	69	11	31	0	0	2	303	3	6.68	4.60	1.45	1.63	14.9	10.2	2.06	.384	10.24	232	5.51	137	13.95	-9.8
13	Todd Van Poppel T. Van Poppel	9.06	15	1996	TOT	37	3	9	.250	53	1	1	1	99.1	139	100	107	24	62	3	8	3	491	7	4.80	5.62	0.85	2.17	10.8	12.6	2.02	.330	9.69	184	7.20	145	12.59	-24.6
14	Bryan Rekar B. Rekar	8.95	11	1996	COL	14	2	4	.333	25	0	0	0	58.1	87	58	61	11	26	5	0	1	289	4	3.86	4.01	0.96	1.70	8.7	9.0	1.94	.342	9.41	173	6.35	133	13.42	-9
15	Michael Fulmer M. Fulmer	8.78	10	2020	DET	10	0	2	.000	20	0	0	0	27.2	45	27	27	8	12	1	0	0	136	0	6.51	3.90	1.67	2.60	14.7	8.8	2.06	.389	8.78	201	6.91	157	14.64	-7.8
16	Joe Mays J. Mays	8.70	10	2006	TOT	13	0	5	.000	25	0	0	0	50.2	78	49	56	11	26	0	0	2	250	6	4.44	4.62	0.96	1.95	10.0	10.4	2.05	.356	9.95	191	6.51	143	13.86	-11
17	Luis Mendoza L. Mendoza	8.67	11	2008	TEX	25	3	8	.273	35	0	0	1	63.1	97	61	74	7	25	6	6	4	316	5	4.97	3.55	1.40	0.99	11.1	7.9	1.93	.370	10.52	194	4.92	112	13.78	-3.5
18	Mark Clark M. Clark	8.60	15	1999	TEX	15	3	7	.300	44	0	0	0	74.1	103	71	73	17	34	1	0	1	353	7	5.33	4.12	1.29	2.06	12.5	9.6	1.84	.335	8.84	172	6.32	129	12.47	-11.6
19	Bobby Miller B. Miller	8.52	13	2024	LAD	13	2	4	.333	52	0	0	0	56.0	69	53	53	17	30	2	0	0	258	7	8.36	4.82	1.73	2.73	20.2	11.6	1.77	.331	8.52	210	6.96	168	11.09	-17.2
20	Kirtley Baker K. Baker	8.44	12	1893	BAL	15	3	8	.273	26	8	0	0	91.2	138	86	111	5	58	5	3		472	6	2.55	5.69	0.45	0.49	5.5	12.3	2.14	.352	10.90	178	5.45	115	13.55	-6.5
21	Josh Towers J. Towers	8.42	12	2006	TOR	15	2	10	.167	35	0	0	0	62.0	93	58	62	17	17	3	1	3	295	1	5.08	2.47	2.06	2.47	11.9	5.8	1.77	.341	9.00	183	6.54	144	13.50	-13.5
22	Kyle Davies K. Davies	8.38	14	2006	ATL	14	3	7	.300	51	1	0	0	63.1	90	59	60	14	33	3	0	0	312	3	7.25	4.69	1.55	1.99	16.3	10.6	1.94	.360	8.53	187	6.11	136	12.79	-11.6
23	Dewey McDougal D. McDougal	8.32	14	1895	STL	18	3	10	.231	23	10	0	0	114.2	187	106	146	11	46	10	4		575	1	1.81	3.61	0.50	0.86	4.0	8.0	2.03	.363	11.46	176	5.89	125	14.68	-15.3
24	Jimmy Haynes J. Haynes	8.29	11	1996	BAL	26	3	6	.333	65	0	0	1	89.0	122	82	84	14	58	2	8	1	435	5	6.57	5.87	1.12	1.42	14.9	13.3	2.02	.365	8.49	168	5.77	117	12.34	-8.5
25	Luther Roy L. Roy	8.29	11	1929	TOT	23	3	7	.300	16	1	0	0	92.1	141	85	93	11	39	3	4		457	4	1.56	3.80	0.41	1.07	3.5	8.5	1.95	.335	9.06	163	5.73	117	13.74	-7.2