Since 1918, Eddie Matteson has the lowest ERA, with an ERA of 1.73.

Interpreted as:

lowest career era with a minimum of 0.5 IP per team game by a player + since 1918

	NAME	ERA	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	Eddie Matteson E. Matteson	1.73	14	5	3	.625	6	17	2	0	0	67.2	57	13	20	2	15	1	5		257	0	2.26	2.00	1.13	0.27	6.6	5.8	1.06	.248	2.66	64	2.82	102	7.58	-0.7
2	Paul Skenes P. Skenes	2.05	48	18	12	.600	48	336	1	0	0	281.0	200	64	69	19	68	12	0	0	1,095	4	10.76	2.18	4.94	0.61	30.7	6.2	0.95	.274	2.21	48	2.47	61	6.41	50.1
3	Jeff Tesreau J. Tesreau	2.32	12	4	4	.500	9	31	3	1	0	73.2	61	19	27	1	21	0	1		298	2	3.79	2.57	1.48	0.12	10.4	7.0	1.11	.245	3.30	87	2.42	93	7.45	1.4
4	Byron Houck B. Houck	2.39	27	2	4	.333	2	29	0	0	2	71.2	58	19	24	0	29	0	22		291	1	3.64	3.64	1.00	0.00	10.0	10.0	1.21	.249	3.01	85	2.64	92	7.28	1.9
5	Hippo Vaughn H. Vaughn	2.46	130	65	51	.560	122	450	83	16	1	1007.1	934	275	361	23	250	26	7		4,125	13	4.02	2.23	1.80	0.21	10.9	6.1	1.18	.270	3.23	77	2.78	88	8.34	38
6	Ray Fisher R. Fisher	2.47	59	24	16	.600	41	97	22	6	2	375.1	330	103	141	9	88	9	11		1,528	2	2.33	2.11	1.10	0.22	6.3	5.8	1.11	.242	3.38	85	3.20	106	7.91	-9.9
7	Noah Cameron N. Cameron	2.47	17	7	5	.583	17	78	0	0	0	98.1	76	27	27	10	28	3	0	1	395	3	7.14	2.56	2.79	0.92	19.7	7.1	1.06	.239	2.47	58	3.79	91	6.96	4.1
8	Clayton Kershaw C. Kershaw	2.51	447	219	96	.695	444	3,017	25	15	0	2820.1	2,164	788	865	234	698	46	1	28	11,132	107	9.63	2.23	4.32	0.75	27.1	6.3	1.01	.270	2.76	64	2.85	70	6.91	369.5
9	Hoyt Wilhelm H. Wilhelm	2.52	1,070	143	122	.540	52	1,610	20	5	228	2254.1	1,757	632	773	150	778	62	651	61	9,164	90	6.43	3.11	2.07	0.60	17.6	8.5	1.12	.245	3.09	68	3.06	82	7.01	167.6
10	Mike Vasil M. Vasil	2.53	33	5	3	.625	3	59	0	0	2	78.1	57	22	26	6	42	8	13	5	333	3	6.78	4.83	1.40	0.69	17.7	12.6	1.26	.234	2.99	62	4.51	105	6.55	-1.8
11	Jacob deGrom J. deGrom	2.54	242	94	62	.603	242	1,814	4	2	0	1507.1	1,151	426	463	139	338	25	0	13	5,919	28	10.83	2.02	5.37	0.83	30.6	5.7	0.99	.281	2.76	65	2.66	65	6.87	239.8
12	Jose Fernandez J. Fernandez	2.58	76	38	17	.691	76	589	0	0	0	471.1	357	135	150	31	140	13	0	12	1,888	16	11.25	2.67	4.21	0.59	31.2	7.4	1.05	.292	2.86	68	2.43	64	6.82	73
13	Lefty Tyler L. Tyler	2.59	76	35	24	.593	68	176	47	8	1	542.1	490	156	185	9	151	8	7		2,204	4	2.92	2.51	1.17	0.15	8.0	6.9	1.18	.259	3.07	84	2.96	95	8.13	7.3
14	Joe Benz J. Benz	2.60	30	8	8	.500	17	30	10	1	0	156.0	158	45	58	1	28	2	6		640	1	1.73	1.62	1.07	0.06	4.7	4.4	1.19	.271	3.35	95	2.51	89	9.12	5.2
15	Roy Sanders R. Sanders	2.60	28	7	9	.438	14	55	6	1	1	156.0	135	45	59	1	52	2	14		644	4	3.17	3.00	1.06	0.06	8.5	8.1	1.20	.251	3.40	92	2.65	96	7.79	2
16	Slim Sallee S. Sallee	2.60	110	41	25	.621	58	95	41	5	6	589.0	603	170	219	18	62	3	29		2,378	1	1.45	0.95	1.53	0.28	4.0	2.6	1.13	.266	3.35	87	3.00	98	9.21	0.2
17	Butch Wensloff B. Wensloff	2.60	41	16	13	.552	32	125	19	1	1	276.2	222	80	99	11	95	1	5		1,128	2	4.07	3.09	1.32	0.36	11.1	8.4	1.15	.235	3.22	77	3.09	89	7.22	10.6
18	Eddie Cicotte E. Cicotte	2.61	115	62	36	.633	100	301	82	10	5	876.0	847	254	307	13	163	6	14		3,490	6	3.09	1.67	1.85	0.13	8.6	4.7	1.15	.277	3.15	81	2.58	80	8.70	61.2
19	Bob Harmon B. Harmon	2.62	16	2	7	.222	9	7	5	0	0	82.1	76	24	30	3	12	0	5		321	0	0.77	1.31	0.58	0.33	2.2	3.7	1.07	.244	3.28	93	2.97	108	8.31	-1.8
20	Hod Eller H. Eller	2.67	123	50	35	.588	78	304	45	8	4	710.2	675	211	253	17	176	15	37		2,909	4	3.85	2.23	1.73	0.22	10.5	6.1	1.20	.275	3.20	93	2.78	95	8.55	7.8
21	Fred Anderson F. Anderson	2.67	18	4	2	.667	4	24	2	1	3	70.2	62	21	27	1	17	2	9		286	1	3.06	2.17	1.41	0.13	8.4	5.9	1.12	.252	3.44	100	2.54	97	7.90	0.4
22	Johnny Enzmann J. Enzmann	2.69	60	10	12	.455	20	86	11	0	2	250.2	276	75	113	3	53	12	28		1,040	8	3.09	1.90	1.62	0.11	8.3	5.1	1.31	.308	4.06	86	2.66	84	9.91	14.9
23	Bob Lee B. Lee	2.71	269	25	23	.521	7	315	0	0	64	492.0	402	148	177	31	196	5	152	35	2,044	12	5.76	3.59	1.61	0.57	15.4	9.6	1.22	.248	3.24	81	3.30	98	7.35	5.7
24	Tim Burke T. Burke	2.72	498	49	33	.598	2	444	0	0	102	699.1	624	211	251	49	219	21	262	71	2,906	25	5.71	2.82	2.03	0.63	15.3	7.5	1.21	.265	3.23	75	3.45	93	8.03	19.9
25	Dick Rudolph D. Rudolph	2.72	84	27	40	.403	70	154	44	6	2	553.1	580	167	237	10	124	8	12		2,303	15	2.50	2.02	1.24	0.16	6.7	5.4	1.27	.284	3.85	94	2.88	99	9.43	-2