Charlie Stecher has the highest career ERA when starting 10+ games, with an ERA of 10.32.

Interpreted as:

worst era by a player + with at least 10 starts

	NAME	ERA	GS	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	Charlie Stecher C. Stecher	10.32	10	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
2	Hayden Penn H. Penn	9.51	15	33	4	6	.400	53	0	0	0	82.1	122	87	98	17	57	4	6	5	426	5	5.79	6.23	0.93	1.86	12.4	13.4	2.17	.356	10.71	218	6.68	151	13.34	-20.4
3	John Van Benschoten J. Van Benschoten	9.20	19	26	2	13	.133	65	0	0	0	90.0	125	92	100	14	68	10	3	2	463	2	6.50	6.80	0.96	1.40	14.0	14.7	2.14	.363	10.00	213	6.32	145	12.50	-19.7
4	Andy Larkin A. Larkin	8.86	15	39	3	11	.214	69	0	0	1	105.2	139	104	112	18	75	5	11	5	522	5	5.88	6.39	0.92	1.53	13.2	14.4	2.03	.341	9.54	208	6.31	144	11.84	-22.8
5	Ryan Carpenter R. Carpenter	8.57	14	15	2	8	.200	40	0	0	0	63.0	95	60	65	20	17	5	0	0	304	0	5.71	2.43	2.35	2.86	13.2	5.6	1.78	.338	9.29	189	7.09	159	13.57	-18.1
6	Eric Ludwick E. Ludwick	8.35	12	31	2	10	.167	60	0	0	0	74.1	104	69	76	19	44	2	5	2	364	2	7.26	5.33	1.36	2.30	16.5	12.1	1.99	.356	9.20	197	6.69	154	12.59	-19.8
7	J.C. Mejía	8.32	11	28	2	7	.222	61	0	0	0	66.0	80	61	61	15	32	4	8	0	304	3	8.32	4.36	1.91	2.05	20.1	10.5	1.70	.339	8.32	197	5.92	141	10.91	-12.7
8	Dewey McDougal D. McDougal	8.30	15	21	3	11	.214	23	10	0	0	124.2	200	115	157	13	50	11	6		622	1	1.66	3.61	0.46	0.94	3.7	8.0	2.01	.356	11.33	177	6.01	128	14.44	-18.5
9	Harry Colliflower H. Colliflower	8.17	12	14	1	11	.083	8	11	0	0	98.0	152	89	122	6	41	11	2		483	1	0.73	3.77	0.20	0.55	1.7	8.5	1.97	.350	11.20	212	5.16	134	13.96	-14.3
10	Aaron Myette A. Myette	8.16	30	47	6	12	.333	134	0	0	0	154.1	185	140	144	26	106	22	7	1	761	9	7.81	6.18	1.26	1.52	17.6	13.9	1.89	.336	8.40	174	5.97	131	10.79	-23.2
11	Bradley Blalock B. Blalock	8.16	18	21	3	9	.250	47	0	0	0	89.1	120	81	83	21	43	4	2	1	422	2	4.74	4.33	1.09	2.12	11.1	10.2	1.82	.322	8.36	172	6.72	156	12.09	-22.6
12	Jose Roman J. Roman	8.12	10	14	1	8	.111	24	0	0	0	44.1	45	40	49	7	42	1	1	0	221	2	4.87	8.53	0.57	1.42	10.9	19.0	1.96	.259	9.95	195	6.61	160	9.14	-12.1
13	Brad Mills B. Mills	7.97	14	21	4	4	.500	71	0	0	0	79.0	96	70	71	16	43	6	1	2	373	3	8.09	4.90	1.65	1.82	19.0	11.5	1.76	.338	8.09	195	5.78	142	10.94	-14.9
14	Aaron Blair A. Blair	7.89	16	16	2	8	.200	49	0	0	0	73.0	87	64	66	15	39	6	0	4	343	1	6.04	4.81	1.26	1.85	14.3	11.4	1.73	.308	8.14	190	6.32	157	10.73	-19.3
15	Connor Seabold C. Seabold	7.79	19	40	1	11	.083	96	0	0	0	119.0	166	103	107	26	44	10	12	1	566	10	7.26	3.33	2.18	1.97	17.0	7.8	1.76	.359	8.09	166	5.80	131	12.55	-17.2
16	Rodney Bolton R. Bolton	7.69	11	17	2	8	.200	27	0	0	0	64.1	88	55	63	8	30	1	2	1	306	5	3.78	4.20	0.90	1.12	8.8	9.8	1.83	.333	8.81	179	5.24	119	12.31	-6.3
17	Lem Cross L. Cross	7.66	10	11	3	6	.333	18	5	0	0	74.0	118	63	89	12	30	5	1		368	2	2.19	3.65	0.60	1.46	4.9	8.2	2.00	.350	10.82	145	6.69	127	14.35	-11.2
18	Dennis Tankersley D. Tankersley	7.61	16	27	1	10	.091	68	0	0	0	86.1	97	73	78	13	61	7	3	6	409	5	7.09	6.36	1.11	1.36	16.6	14.9	1.83	.323	8.13	178	5.59	137	10.11	-15
19	William Rotes W. Rotes	7.60	19	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
20	Kohei Arihara K. Arihara	7.57	14	15	3	7	.300	38	0	0	0	60.2	81	51	53	15	24	7	0	0	286	1	5.64	3.56	1.58	2.23	13.3	8.4	1.73	.327	7.86	180	6.64	155	12.02	-15.3
21	Anthony Lerew A. Lerew	7.48	11	20	1	7	.125	40	0	0	0	61.1	76	51	53	18	32	3	4	3	291	2	5.87	4.70	1.25	2.64	13.7	11.0	1.76	.293	7.78	175	7.32	172	11.15	-21.1
22	Ben Hendrickson B. Hendrickson	7.41	12	14	1	10	.091	37	0	0	0	58.1	79	48	50	6	29	4	1	1	280	5	5.71	4.47	1.28	0.93	13.2	10.4	1.85	.358	7.71	170	4.83	108	12.19	-2.3
23	Ryan Feierabend R. Feierabend	7.34	20	33	2	12	.143	72	1	0	0	119.0	170	97	97	22	47	5	3	3	557	7	5.45	3.55	1.53	1.66	12.9	8.4	1.82	.360	7.34	171	5.68	132	12.86	-18.7
24	Pedro Hernandez P. Hernandez	7.33	14	16	3	5	.375	33	0	0	0	66.1	98	54	54	13	26	1	1	1	312	1	4.48	3.53	1.27	1.76	10.6	8.3	1.87	.356	7.33	180	5.83	146	13.30	-13.4
25	Milo Lockwood M. Lockwood	7.32	10	11	1	9	.100	48	6	0	0	67.2	99	55	95	4	15		0		325	17	6.38	2.00	3.20	0.53	14.8	4.6	1.68		12.64	245	3.29	127	13.17	-5.7