15 pitchers had an ERA of 10.00. The first three are Cionel Pérez in 2019, Aaron Wilkerson in 2018 and Kevin Gregg in 2014.

Interpreted as:

top 10 or higher pitchers' era in a season

	NAME	ERA	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	ERA-	FIP	FIP-	H/9	PRAA
1	Cionel Pérez C. Pérez	10.00	2019	HOU	5	1	1	.500	0	7	0	0	0	9.0	11	10	10	3	2	0	3	0	40	0	7.00	2.00	3.50	3.00	17.5	5.0	1.44	.286	10.00	222	6.65	147	11.00	-2.2
2	Aaron Wilkerson A. Wilkerson	10.00	2018	MIL	3	0	1	.000	1	10	0	0	0	9.0	12	10	10	4	3	1	2	0	43	0	10.00	3.00	3.33	4.00	23.3	7.0	1.67	.320	10.00	249	8.04	198	12.00	-4
3	Kevin Gregg K. Gregg	10.00	2014	MIA	12	0	0		0	6	0	0	0	9.0	11	10	10	2	5	0	2	0	41	1	6.00	5.00	1.20	2.00	14.6	12.2	1.78	.321	10.00	279	6.35	178	11.00	-2.9
4	Vinnie Chulk V. Chulk	10.00	2012	MIL	7	1	0	1.000	0	10	0	0	0	9.0	17	10	10	0	4	0	4	1	48	0	10.00	4.00	2.50	0.00	20.8	8.3	2.33	.500	10.00	246	2.20	54	17.00	1.8
5	Enrique Gonzalez E. Gonzalez	10.00	2011	DET	8	0	0		0	3	0	0	0	9.0	12	10	10	1	7	0	5	2	44	0	3.00	7.00	0.43	1.00	6.8	15.9	2.11	.333	10.00	240	6.13	152	12.00	-2.1
6	Tim Drew T. Drew	10.00	2000	CLE	3	1	0	1.000	3	5	0	0	0	9.0	17	10	12	1	8	1	0	0	51	0	5.00	8.00	0.63	1.00	9.8	15.7	2.78	.444	12.00	198	6.46	131	17.00	-1.5
7	Hector Ramirez H. Ramirez	10.00	2000	MIL	6	0	1	.000	0	4	0	0	0	9.0	11	10	10	1	5	0	1	0	43	0	4.00	5.00	0.80	1.00	9.3	11.6	1.78	.303	10.00	216	5.35	114	11.00	-0.6
8	Dave Stevens D. Stevens	10.00	1999	CLE	5	0	0		0	6	0	0	0	9.0	10	10	10	1	8	0	0	1	44	1	6.00	8.00	0.75	1.00	13.6	18.2	2.00	.310	10.00	202	5.90	122	10.00	-1
9	Roger Nelson R. Nelson	10.00	1970	KCR	4	0	2	.000	2	3	0	0	0	9.0	18	10	10	3	0	1	0	0	45	2	3.00	0.00		3.00	6.7	0.0	2.00	.395	10.00	269	6.63	169	18.00	-2.7
10	Mark Koenig M. Koenig	10.00	1930	TOT	2	0	1	.000	1	6	0	0	0	9.0	11	10	10	0	8	1	1		44	2	6.00	8.00	0.75	0.00	13.6	18.2	2.11	.379	10.00	211	5.17	108	11.00	-0.4
11	Willie Adams W. Adams	10.00	1913	SLA	4	0	0		0	5	0	0	0	9.0	12	10	14	1	4	3	2		48	0	5.00	4.00	1.25	1.00	10.4	8.3	1.78	.314	14.00	348	5.22	178	12.00	-2.4
12	Harry Betts H. Betts	10.00	1903	SLN	1	0	1	.000	1	2	1	0	0	9.0	11	10	10	0	5	2	0		44	0	2.00	5.00	0.40	0.00	4.5	11.4	1.78	.314	10.00	313	4.64	144	11.00	-1.5
13	Elmer Horton E. Horton	10.00	1898	BKN	1	0	1	.000	1	0	1	0	0	9.0	16	10	13	0	6	0	0		48	1	0.00	6.00	0.00	0.00	0.0	12.5	2.44	.381	13.00	275	4.77	131	16.00	-1.1
14	Al Krumm A. Krumm	10.00	1889	PIT	1	0	1	.000	1	4	1	0	0	9.0	8	10	11	0	10	0	0		45	1	4.00	10.00	0.40	0.00	8.9	22.2	2.00	.258	11.00	273	5.45	148	8.00	-2.2
15	Gid Gardner G. Gardner	10.00	1885	BAL	1	0	1	.000	1	3	1	0	0	9.0	16	10	13	2	6	1	0		50	1	3.00	6.00	0.50	2.00	6.0	12.0	2.44	.368	13.00	308	7.44	245	16.00	-4.4
16	Tom Cheney T. Cheney	10.01	1961	TOT	11	1	3	.250	7	20	0	0	0	29.2	33	33	35	9	30	0	2	0	149	4	6.07	9.10	0.67	2.73	13.4	20.1	2.12	.267	10.62	223	7.36	183	10.01	-11.3
17	Fred Heimach F. Heimach	10.01	1933	BKN	10	0	1	.000	3	7	0	0	0	29.2	49	33	33	2	11	2	3		148	0	2.12	3.34	0.64	0.61	4.7	7.4	2.02	.373	10.01	306	4.52	129	14.87	-3.5
18	Clayton Andrews C. Andrews	10.02	2000	TOR	8	1	2	.333	2	12	0	0	0	20.2	34	23	23	6	9	0	1	0	102	0	5.23	3.92	1.33	2.61	11.8	8.8	2.08	.373	10.02	200	7.04	146	14.81	-5.1
19	Trevor Gott T. Gott	10.03	2020	SFG	15	1	2	.333	0	8	0	0	4	11.2	13	13	13	7	8	1	5	0	57	0	6.17	6.17	1.00	5.40	14.0	14.0	1.80	.182	10.03	229	11.92	279	10.03	-10.4
20	Kevin Frederick K. Frederick	10.03	2002	MIN	8	0	0		0	5	0	0	0	11.2	13	13	13	3	10	0	3	0	56	2	3.86	7.71	0.50	2.31	8.9	17.9	1.97	.263	10.03	221	8.01	187	10.03	-5
21	Alex Sanchez A. Sanchez	10.03	1989	TOR	4	0	1	.000	3	4	0	0	0	11.2	16	13	13	1	14	0	0	0	61	1	3.09	10.80	0.29	0.77	6.6	23.0	2.57	.357	10.03	256	6.78	173	12.34	-3.6
22	Joe Niekro J. Niekro	10.03	1988	MIN	5	1	1	.500	2	7	0	0	0	11.2	16	13	13	2	9	0	2	0	59	2	5.40	6.94	0.78	1.54	11.9	15.3	2.14	.341	10.03	243	6.10	154	12.34	-2.8
23	Stan Perzanowski S. Perzanowski	10.03	1976	TEX	5	0	0		0	6	0	0	0	11.2	20	13	15	3	4	2	0	0	59	1	4.63	3.09	1.50	2.31	10.2	6.8	2.06	.386	11.57	288	6.49	187	15.43	-4
24	Red Swanson R. Swanson	10.03	1956	PIT	9	0	0		0	5	0	0	0	11.2	21	13	13	1	8	0	1	1	63	1	3.86	6.17	0.63	0.77	7.9	12.7	2.49	.408	10.03	271	4.68	122	16.20	-1.1
25	Collin McHugh C. McHugh	10.04	2013	TOT	7	0	4	.000	5	11	0	0	0	26.0	45	29	29	6	5	0	2	0	125	0	3.81	1.73	2.20	2.08	8.8	4.0	1.92	.379	10.04	244	5.77	146	15.58	-4.9