highest single season era + with at least 15 starts

Steve Blass has the worst ERA with 15+ starts in a season, with an ERA of 9.85 in 1973.

Interpreted as:

highest single season era by a player + with at least 15 starts

	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	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
2	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
3	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
4	Hideo Nomo H. Nomo	8.25	18	2004	LAD	18	4	11	.267	54	0	0	0	84.0	105	77	77	19	42	4	0	1	393	3	5.79	4.50	1.29	2.04	13.7	10.7	1.75	.314	8.25	200	6.34	144	11.25	-18.1
5	Chad Durbin C. Durbin	8.21	16	2000	KCR	16	2	5	.286	37	0	0	0	72.1	91	66	71	14	43	0	0	1	349	7	4.60	5.35	0.86	1.74	10.6	12.3	1.85	.302	8.83	158	6.40	129	11.32	-11.1
6	Ed Holley E. Holley	8.12	17	1934	TOT	20	1	11	.083	16	2	0	0	82.0	105	74	78	11	37	6	1		383	0	1.76	4.06	0.43	1.21	4.2	9.7	1.73	.300	8.56	182	6.05	133	11.52	-11.6
7	Jonathan Sanchez J. Sanchez	8.07	15	2012	TOT	15	1	9	.100	45	0	0	0	64.2	82	58	60	11	53	5	0	2	327	6	6.26	7.38	0.85	1.53	13.8	16.2	2.09	.333	8.35	192	6.60	160	11.41	-17.7
8	Scott Erickson S. Erickson	7.87	16	2000	BAL	16	5	8	.385	41	1	0	0	92.2	127	81	81	14	48	5	0	0	446	3	3.98	4.66	0.85	1.36	9.2	10.8	1.89	.334	7.87	167	5.92	123	12.33	-11.3
9	Chris Tillman C. Tillman	7.84	19	2017	BAL	24	1	7	.125	63	0	0	0	93.0	125	81	86	24	51	4	1	0	444	11	6.10	4.94	1.24	2.32	14.2	11.5	1.89	.334	8.32	176	6.92	152	12.10	-23.3
10	Cal Eldred C. Eldred	7.79	15	1999	MIL	20	2	8	.200	60	0	0	0	82.0	101	71	75	19	46	1	2	0	392	8	6.59	5.05	1.30	2.09	15.3	11.7	1.79	.308	8.23	171	6.39	138	11.09	-16.2
11	Les Sweetland L. Sweetland	7.71	25	1930	PHN	34	7	15	.318	36	8	1	0	167.0	271	143	164	24	60	5	5		817	0	1.94	3.23	0.60	1.29	4.4	7.3	1.98	.357	8.84	141	6.11	113	14.60	-10.3
12	Scott Aldred S. Aldred	7.68	15	1997	MIN	17	2	10	.167	33	0	0	0	77.1	102	66	66	20	28	3	0	2	350	7	3.84	3.26	1.18	2.33	9.4	8.0	1.68	.308	7.68	165	6.81	150	11.87	-19.6
13	William Rotes W. Rotes	7.60	19	1893	LOU	20	5	12	.294	22	17	0	0	151.2	244	128	173	10	66	10	1		769	1	1.31	3.92	0.33	0.59	2.9	8.6	2.04	.354	10.27	170	5.31	119	14.48	-16.2
14	Jack Wadsworth J. Wadsworth	7.60	22	1894	LOU	22	4	18	.182	57	20	0	0	173.0	261	146	204	10	103	4	0		866	13	2.97	5.36	0.55	0.52	6.6	11.9	2.10	.363	10.61	149	5.76	113	13.58	-14.9
15	Claude Willoughby C. Willoughby	7.59	24	1930	PHN	41	4	17	.190	38	5	1	1	153.0	241	129	147	17	68	2	8		744	3	2.24	4.00	0.56	1.00	5.1	9.1	2.02	.362	8.65	139	5.82	108	14.18	-5
16	Aaron Blair A. Blair	7.59	15	2016	ATL	15	2	7	.222	46	0	0	0	70.0	82	59	61	14	34	6	0	4	324	0	5.91	4.37	1.35	1.80	14.2	10.5	1.66	.304	7.84	184	6.14	153	10.54	-17.2
17	Ed Correa E. Correa	7.59	15	1987	TEX	15	3	5	.375	61	0	0	0	70.0	83	59	63	17	52	4	0	2	339	9	7.84	6.69	1.17	2.19	18.0	15.3	1.93	.322	8.10	167	6.67	148	10.67	-16.7
18	Charlie Morton C. Morton	7.57	17	2010	PIT	17	2	12	.143	59	0	0	0	79.2	112	67	79	15	26	7	0	3	382	5	6.67	2.94	2.27	1.69	15.4	6.8	1.73	.353	8.92	194	5.28	135	12.65	-12.4
19	Jesse Duryea J. Duryea	7.54	15	1893	WSH	17	4	10	.286	20	9	0	0	117.0	182	98	137	8	56	13	2		597	7	1.54	4.31	0.36	0.62	3.4	9.4	2.03	.348	10.54	160	5.56	118	14.00	-10.7
20	Mike Moore M. Moore	7.53	25	1995	DET	25	5	15	.250	64	1	0	0	132.2	179	111	118	24	68	2	0	3	632	8	4.34	4.61	0.94	1.63	10.1	10.8	1.86	.327	8.01	158	6.07	127	12.14	-18.6
21	Jim Abbott J. Abbott	7.48	23	1996	CAL	27	2	18	.100	58	1	0	0	142.0	171	118	128	23	78	4	2	3	654	13	3.68	4.94	0.74	1.46	8.9	11.9	1.75	.301	8.11	150	6.18	125	10.84	-19
22	Ruben Quevedo R. Quevedo	7.47	15	2000	CHC	21	3	10	.231	65	1	0	0	88.0	96	73	81	21	54	3	1	4	418	2	6.65	5.52	1.20	2.15	15.6	12.9	1.70	.273	8.28	165	6.69	142	9.82	-19.4
23	Danny Darwin D. Darwin	7.45	15	1995	TOT	20	3	10	.231	58	1	0	0	99.0	131	82	87	25	31	4	0	3	448	2	5.27	2.82	1.87	2.27	12.9	6.9	1.64	.321	7.91	157	6.27	133	11.91	-17.1
24	Spencer Howard S. Howard	7.43	15	2021	TOT	19	0	5	.000	52	0	0	0	49.2	53	41	45	7	27	3	1	0	229	5	9.42	4.89	1.93	1.27	22.7	11.8	1.61	.329	8.15	172	4.71	108	9.60	-1.8
25	Carlos Perez C. Perez	7.43	16	1999	LAD	17	2	10	.167	40	0	0	0	89.2	116	74	77	23	39	6	0	1	420	2	4.01	3.91	1.03	2.31	9.5	9.3	1.73	.298	7.73	175	7.07	155	11.64	-25.2