lowest era- in a season by a pitcher with a minimum of 90 ip

Jacob deGrom has the lowest ERA- with 90.0+ innings pitched in a season, with an ERA- of 27 in 2021.

	NAME	ERA-	IP	SEASON	TM	G	W	L	W%	GS	ERA	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	FIP	FIP-	H/9	PRAA
1	Jacob deGrom J. deGrom	27	92.0	2021	NYM	15	7	2	.778	15	1.08	146	1	1	0	40	11	14	6	11	1	0	0	324	0	14.28	1.08	13.27	0.59	45.1	3.4	0.55	.213	1.37	1.23	29	3.91	30.6
2	Tim Burke T. Burke	29	91.0	1987	MON	55	7	0	1.000	0	1.19	58	0	0	18	64	12	18	3	17	0	30	6	354	2	5.74	1.68	3.41	0.30	16.4	4.8	0.89	.221	1.78	2.57	64	6.33	14.9
3	Bruce Sutter B. Sutter	31	107.1	1977	CHC	62	7	3	.700	0	1.34	129	0	0	31	69	16	21	5	23	1	48	7	411	7	10.82	1.93	5.61	0.42	31.4	5.6	0.86	.253	1.76	1.60	38	5.79	29.2
4	Ranger Suárez R. Suárez	32	106.0	2021	PHI	39	8	5	.615	12	1.36	107	1	1	4	73	16	20	4	33	5	13	3	418	1	9.08	2.80	3.24	0.34	25.6	7.9	1.00	.257	1.70	2.71	63	6.20	18.7
5	Tim Keefe T. Keefe	35	105.0	1880	TRO	12	6	6	.500	12	0.86	39	12	0	0	68	10	27	0	16		0		397	1	3.34	1.37	2.44	0.00	9.8	4.0	0.80		2.31	2.25	91	5.83	3.6
6	Pedro Martinez P. Martinez	35	217.0	2000	BOS	29	18	6	.750	29	1.74	284	7	4	0	128	42	44	17	32	14	0	0	817	1	11.78	1.33	8.88	0.71	34.8	3.9	0.74	.236	1.82	2.16	47	5.31	61.5
7	Ted Abernathy T. Abernathy	35	106.1	1967	CIN	70	6	3	.667	0	1.27	88	0	0	28	63	15	19	1	41	5	61	5	427	1	7.45	3.47	2.15	0.08	20.6	9.6	0.98	.212	1.61	2.30	66	5.33	13.4
8	Jeff Montgomery J. Montgomery	35	92.0	1989	KCR	63	7	3	.700	0	1.37	94	0	0	18	66	14	16	3	25	2	39	4	363	6	9.20	2.45	3.76	0.29	25.9	6.9	0.99	.264	1.57	2.02	55	6.46	17.4
9	Dutch Leonard D. Leonard	36	224.2	1914	BSA	36	19	5	.792	25	0.96	176	17	7	3	139	24	34	3	60	8	8		842	2	7.05	2.40	2.93	0.12	20.9	7.1	0.89	.229	1.36	1.95	70	5.57	20.4
10	Ferdie Schupp F. Schupp	36	140.1	1916	NYG	30	9	3	.750	11	0.90	86	8	4	1	79	14	22	1	37	5	17		525	2	5.52	2.37	2.32	0.06	16.4	7.0	0.83	.197	1.41	2.08	84	5.07	6.1
11	Dellin Betances D. Betances	36	90.0	2014	NYY	70	5	0	1.000	0	1.40	135	0	0	1	46	14	15	4	24	4	8	1	341	2	13.50	2.40	5.63	0.40	39.6	7.0	0.78	.241	1.50	1.64	42	4.60	22.2
12	John Hiller J. Hiller	37	125.1	1973	DET	65	10	5	.667	0	1.44	124	0	0	38	89	20	21	7	39	0	60	7	498	1	8.90	2.80	3.18	0.50	24.9	7.8	1.02	.250	1.51	2.24	57	6.39	22.8
13	Greg Maddux G. Maddux	37	202.0	1994	ATL	25	16	6	.727	25	1.56	156	10	3	0	150	35	44	4	31	6	0	3	774	3	6.95	1.38	5.03	0.18	20.2	4.0	0.90	.253	1.96	2.39	55	6.68	43.7
14	Red Munger R. Munger	37	121.0	1944	SLN	21	11	3	.786	12	1.34	55	7	2	2	92	18	23	2	41	2	8		479	0	4.09	3.05	1.34	0.15	11.5	8.6	1.10	.237	1.71	2.91	80	6.84	9.5
15	Bob Gibson B. Gibson	38	304.2	1968	STL	34	22	9	.710	34	1.12	268	28	13	0	198	38	49	11	62	7	0	6	1,161	4	7.92	1.83	4.32	0.32	23.1	5.3	0.85	.230	1.45	1.77	63	5.85	34.8
16	Jim Kern J. Kern	38	143.0	1979	TEX	71	13	5	.722	0	1.57	136	0	0	29	99	25	35	5	62	2	57	6	578	5	8.56	3.90	2.19	0.31	23.5	10.7	1.13	.252	2.20	2.61	64	6.23	23.4
17	Greg Maddux G. Maddux	39	209.2	1995	ATL	28	19	2	.905	28	1.63	181	10	3	0	147	38	39	8	23	4	0	3	785	1	7.77	0.99	7.87	0.34	23.1	2.9	0.81	.244	1.67	2.25	52	6.31	46.9
18	Walter Johnson W. Johnson	39	346.0	1913	WSH	48	36	7	.837	36	1.14	243	29	11	2	232	44	56	9	38	9	10		1,271	2	6.32	0.99	6.39	0.23	19.1	3.0	0.78	.229	1.46	1.90	63	6.03	42.3
19	Mordecai Brown M. Brown	39	277.1	1906	CHC	36	26	6	.813	32	1.04	144	27	9	3	198	32	56	1	61	4	4		1,044	2	4.67	1.98	2.36	0.03	13.8	5.8	0.93	.236	1.82	2.08	75	6.43	21.1
20	Tug McGraw T. McGraw	40	92.1	1980	PHI	57	5	4	.556	0	1.46	75	0	0	20	62	15	16	3	23	2	48	9	355	1	7.31	2.24	3.26	0.29	21.1	6.5	0.92	.234	1.56	2.35	64	6.04	13.4
21	Kris Medlen K. Medlen	40	138.0	2012	ATL	50	10	1	.909	12	1.57	120	2	1	1	103	24	26	6	23	0	7	0	520	3	7.83	1.50	5.22	0.39	23.1	4.4	0.91	.261	1.70	2.41	63	6.72	22
22	Steve Rogers S. Rogers	41	134.0	1973	MON	17	10	5	.667	17	1.54	64	7	3	0	93	23	28	5	49	1	0	3	527	3	4.30	3.29	1.31	0.34	12.1	9.3	1.06	.216	1.88	3.21	84	6.25	9.1
23	Mark Eichhorn M. Eichhorn	41	157.0	1986	TOR	69	14	6	.700	0	1.72	166	0	0	10	105	30	32	8	45	7	38	14	612	2	9.52	2.58	3.69	0.46	27.1	7.4	0.96	.251	1.83	2.30	56	6.02	31.8
24	Jesse Orosco J. Orosco	41	110.0	1983	NYM	62	13	7	.650	0	1.47	84	0	0	17	76	18	27	3	38	1	42	7	432	1	6.87	3.11	2.21	0.25	19.4	8.8	1.04	.239	2.21	2.63	73	6.22	12.3
25	Peter Moylan P. Moylan	41	90.0	2007	ATL	80	5	3	.625	0	1.80	63	0	0	1	65	18	27	6	31	7	16	12	359	2	6.30	3.10	2.03	0.60	17.5	8.6	1.07	.234	2.70	3.96	89	6.50	4.8