Jackson Kowar had the highest ERA with 17.0+ innings pitched in 2021, with an ERA of 11.27 in his rookie season.

Interpreted as:

highest era by a player in 2021, min 17 ip

	NAME	ERA	IP	SEASON	TM	G	W	L	W%	GS	SO	CG	SHO	SV	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	Jackson Kowar J. Kowar	11.27	30.1	2021	KCR	9	0	6	.000	8	29	0	0	0	43	38	38	7	20	2	1	0	154	8	8.60	5.93	1.45	2.08	18.8	13.0	2.08	.375	11.27	251	6.43	152	12.76	-7.5
2	David Hess D. Hess	9.90	20.0	2021	TOT	15	2	2	.500	1	18	0	0	0	32	22	24	10	11	1	4	1	102	0	8.10	4.95	1.64	4.50	17.6	10.8	2.15	.355	10.80	237	9.66	233	14.40	-12.6
3	Sean Guenther S. Guenther	9.30	20.1	2021	MIA	14	0	1	.000	0	15	0	0	0	31	21	22	1	10	2	2	1	103	2	6.64	4.43	1.50	0.44	14.6	9.7	2.02	.400	9.74	222	4.10	99	13.72	0.1
4	Glenn Otto G. Otto	9.26	23.1	2021	TEX	6	0	3	.000	6	28	0	0	0	32	24	24	2	8	2	0	0	111	1	10.80	3.09	3.50	0.77	25.2	7.2	1.71	.423	9.26	210	3.16	72	12.34	3.2
5	Luis Oviedo L. Oviedo	8.80	29.2	2021	PIT	22	1	2	.333	1	31	0	0	0	33	29	32	4	26	2	12	1	147	2	9.40	7.89	1.19	1.21	21.1	17.7	1.99	.345	9.71	208	5.66	133	10.01	-4.7
6	Wes Benjamin W. Benjamin	8.74	22.2	2021	TEX	13	0	2	.000	2	19	0	0	0	29	22	23	6	17	0	4	0	112	1	7.54	6.75	1.12	2.38	17.0	15.2	2.03	.329	9.13	198	7.18	163	11.51	-6.8
7	Jerad Eickhoff J. Eickhoff	8.69	19.2	2021	NYM	5	0	2	.000	4	13	0	0	0	30	19	24	9	10	3	0	2	104	0	5.95	4.58	1.30	4.12	12.5	9.6	2.03	.304	10.98	218	9.77	233	13.73	-12.3
8	Shaun Anderson S. Anderson	8.49	23.1	2021	TOT	16	0	0		0	19	0	0	0	36	22	30	4	12	2	6	1	124	3	7.33	4.63	1.58	1.54	15.3	9.7	2.06	.368	11.57	198	5.56	127	13.89	-2.9
9	Trevor Megill T. Megill	8.37	23.2	2021	CHC	28	1	2	.333	0	30	0	0	0	36	22	24	7	8	1	3	1	115	5	11.41	3.04	3.75	2.66	26.1	7.0	1.86	.420	9.13	201	5.61	134	13.69	-3.8
10	José De León J. De León	8.35	18.1	2021	CIN	9	0	1	.000	2	33	0	0	0	22	17	17	4	11	2	1	0	91	3	16.20	5.40	3.00	1.96	36.3	12.1	1.80	.439	8.35	189	4.53	102	10.80	-0.1
11	J.C. Mejía	8.25	52.1	2021	CLE	17	1	7	.125	11	47	0	0	0	60	48	48	13	24	3	1	0	238	2	8.08	4.13	1.96	2.24	19.7	10.1	1.61	.311	8.25	195	6.14	147	10.32	-11.6
12	Spenser Watkins S. Watkins	8.07	54.2	2021	BAL	16	2	7	.222	10	35	0	0	0	74	49	50	14	19	2	4	0	255	4	5.76	3.13	1.84	2.30	13.7	7.5	1.70	.324	8.23	183	6.36	140	12.18	-10.4
13	Matt Shoemaker M. Shoemaker	8.06	60.1	2021	MIN	16	3	8	.273	11	40	0	0	0	73	54	56	15	27	3	4	1	284	1	5.97	4.03	1.48	2.24	14.1	9.5	1.66	.291	8.35	188	6.56	155	10.89	-15.8
14	JB Bukauskas	7.79	17.1	2021	ARI	21	2	2	.500	0	14	0	0	0	24	15	19	4	7	0	4	1	81	0	7.27	3.63	2.00	2.08	17.3	8.6	1.79	.357	9.87	186	5.76	140	12.46	-3.3
15	Randy Dobnak R. Dobnak	7.64	50.2	2021	MIN	14	1	7	.125	6	27	0	0	1	66	43	44	11	12	1	3	0	228	2	4.80	2.13	2.25	1.95	11.8	5.3	1.54	.311	7.82	179	5.69	134	11.72	-8.3
16	Andrew Albers A. Albers	7.58	19.0	2021	MIN	5	1	2	.333	3	12	0	0	0	24	16	16	9	9	1	2	1	89	0	5.68	4.26	1.33	4.26	13.5	10.1	1.74	.259	7.58	177	9.64	228	11.37	-11.5
17	Brett de Geus B. de Geus	7.56	50.0	2021	TOT	47	3	2	.600	0	41	0	0	0	62	42	47	6	25	8	16	1	238	6	7.38	4.50	1.64	1.08	17.2	10.5	1.74	.354	8.46	175	5.06	119	11.16	-4.5
18	Yency Almonte Y. Almonte	7.55	47.2	2021	COL	48	1	3	.250	0	47	0	0	0	47	40	42	9	29	4	15	1	217	3	8.87	5.48	1.62	1.70	21.7	13.4	1.59	.297	7.93	157	5.72	129	8.87	-6.3
19	Bryan Garcia B. Garcia	7.55	39.1	2021	DET	39	3	2	.600	0	32	0	0	2	48	33	38	10	25	2	10	1	192	7	7.32	5.72	1.28	2.29	16.7	13.0	1.86	.309	8.69	175	6.90	163	10.98	-11.8
20	Dean Kremer D. Kremer	7.55	53.2	2021	BAL	13	0	7	.000	13	47	0	0	0	63	45	46	17	25	1	0	0	245	5	7.88	4.19	1.88	2.85	19.2	10.2	1.64	.297	7.71	171	6.98	154	10.57	-13.6
21	Spencer Howard S. Howard	7.43	49.2	2021	TOT	19	0	5	.000	15	52	0	0	0	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
22	Reid Detmers R. Detmers	7.40	20.2	2021	LAA	5	1	3	.250	5	19	0	0	0	26	17	17	5	11	2	0	1	101	1	8.27	4.79	1.73	2.18	18.8	10.9	1.79	.328	7.40	168	6.36	146	11.32	-4.5
23	Tanner Rainey T. Rainey	7.39	31.2	2021	WSH	38	1	3	.250	0	42	0	0	3	29	26	27	6	25	3	8	1	151	0	11.94	7.11	1.68	1.71	27.8	16.6	1.71	.307	7.67	176	5.63	131	8.24	-4.7
24	Jake Arrieta J. Arrieta	7.39	98.2	2021	TOT	24	5	14	.263	24	83	0	0	0	131	81	91	24	44	6	0	3	469	3	7.57	4.01	1.89	2.19	17.7	9.4	1.77	.343	8.30	180	6.16	147	11.95	-21.8
25	Robert Dugger R. Dugger	7.36	25.2	2021	SEA	12	0	2	.000	4	19	0	0	0	34	21	24	4	12	1	5	0	121	1	6.66	4.21	1.58	1.40	15.7	9.9	1.79	.353	8.42	178	5.23	126	11.92	-3.2