lowest career era since 1920 with at least 300 innings pitched

Since 1920, Emmanuel Clase has the lowest ERA when pitching at least 300 innings, with an ERA of 1.88.

Interpreted as:

lowest career era by a player since 1920 with at least 300 innings pitched

	NAME	ERA	IP	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	Emmanuel Clase E. Clase	1.88	360.0	366	21	25	.457	1	349	0	0	182	267	75	111	15	70	9	297	10	1,417	19	8.73	1.75	4.99	0.38	24.6	4.9	0.94	.259	2.78	45	2.43	58	6.68	68.8
2	Paul Skenes P. Skenes	1.96	320.2	55	21	13	.618	55	386	1	0	0	230	70	76	21	74	12	0	0	1,247	4	10.83	2.08	5.22	0.59	31.0	5.9	0.95	.277	2.13	46	2.39	58	6.46	61
3	Mariano Rivera M. Rivera	2.21	1283.2	1,115	82	60	.577	10	1,173	0	0	652	998	315	340	71	286	46	952	41	5,103	13	8.22	2.01	4.10	0.50	23.0	5.6	1.00	.263	2.38	49	2.76	61	7.00	246.7
4	Billy Wagner B. Wagner	2.31	903.0	853	47	40	.540	0	1,196	0	0	422	601	232	262	82	300	33	703	26	3,600	43	11.92	2.99	3.99	0.82	33.2	8.3	1.00	.261	2.61	54	2.72	63	5.99	159
5	Takashi Saito T. Saito	2.34	338.0	338	21	15	.583	0	400	0	0	84	250	88	99	25	108	14	189	13	1,363	9	10.65	2.88	3.70	0.67	29.3	7.9	1.06	.276	2.64	55	2.80	66	6.66	55.7
6	Mike Adams M. Adams	2.41	407.1	408	21	20	.512	0	409	0	0	4	316	109	122	33	126	6	60	12	1,653	7	9.04	2.78	3.25	0.73	24.7	7.6	1.09	.262	2.70	60	3.09	75	6.98	45.6
7	Jonathan Papelbon J. Papelbon	2.44	725.2	689	41	36	.532	3	808	0	0	368	572	197	226	57	185	34	585	18	2,938	14	10.02	2.29	4.37	0.71	27.5	6.3	1.04	.278	2.80	58	2.80	69	7.09	105.2
8	Bryan Harvey B. Harvey	2.49	387.0	322	17	25	.405	0	448	0	0	177	278	107	122	30	144	2	278	19	1,582	25	10.42	3.35	3.11	0.70	28.3	9.1	1.09	.259	2.84	62	2.62	65	6.47	59.8
9	Aroldis Chapman A. Chapman	2.52	821.1	863	60	47	.561	0	1,331	0	0	367	475	230	255	54	408	33	563	7	3,341	87	14.58	4.47	3.26	0.59	39.8	12.2	1.08	.278	2.79	61	2.36	57	5.20	161.8
10	Hoyt Wilhelm H. Wilhelm	2.52	2254.1	1,070	143	122	.540	52	1,610	20	5	228	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
11	Dellin Betances D. Betances	2.53	394.1	374	21	23	.477	1	633	0	0	36	240	111	124	26	183	28	86	5	1,613	28	14.45	4.18	3.46	0.59	39.2	11.3	1.07	.288	2.83	61	2.39	56	5.48	78.8
12	Clayton Kershaw C. Kershaw	2.53	2855.1	455	223	96	.699	451	3,052	25	15	0	2,193	804	881	235	713	46	1	28	11,279	108	9.62	2.25	4.28	0.74	27.1	6.3	1.02	.271	2.78	65	2.85	70	6.91	375.1
13	Kenley Jansen K. Jansen	2.57	927.1	934	54	40	.574	0	1,278	0	0	475	610	265	284	88	282	32	700	20	3,680	21	12.40	2.74	4.53	0.85	34.7	7.7	0.96	.261	2.76	65	2.62	64	5.92	147.2
14	Jacob deGrom J. deGrom	2.57	1539.2	248	96	65	.596	248	1,851	4	2	0	1,173	440	477	146	345	25	0	13	6,045	30	10.82	2.02	5.37	0.85	30.6	5.7	0.99	.279	2.79	66	2.70	66	6.86	239.4
15	Jose Fernandez J. Fernandez	2.58	471.1	76	38	17	.691	76	589	0	0	0	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
16	Craig Kimbrel C. Kimbrel	2.58	821.2	851	56	48	.538	0	1,282	0	0	440	492	236	263	75	346	40	656	11	3,306	70	14.04	3.79	3.71	0.82	38.8	10.5	1.02	.267	2.88	63	2.60	64	5.39	131.8
17	Darren O'Day D. O'Day	2.59	609.0	644	42	21	.667	0	637	0	0	21	458	175	189	64	172	50	155	24	2,461	3	9.41	2.54	3.70	0.95	25.9	7.0	1.03	.256	2.79	61	3.48	82	6.77	52.4
18	Felipe Vazquez F. Vazquez	2.61	330.2	323	17	13	.567	0	402	0	0	89	254	96	109	22	101	16	175	7	1,348	13	10.94	2.75	3.98	0.60	29.8	7.5	1.07	.287	2.97	63	2.65	64	6.91	55.7
19	Josh Hader J. Hader	2.64	512.1	468	34	31	.523	0	829	0	0	226	282	150	164	65	198	24	321	6	2,019	19	14.56	3.48	4.19	1.14	41.1	9.8	0.94	.240	2.88	64	2.88	69	4.95	75.7
20	Bryan Abreu B. Abreu	2.65	329.2	317	16	12	.571	0	448	0	0	16	239	97	107	25	148	22	62	0	1,369	20	12.23	4.04	3.03	0.68	32.7	10.8	1.17	.295	2.92	65	2.98	72	6.52	41.9
21	Koji Uehara K. Uehara	2.66	480.2	436	22	26	.458	12	572	0	0	95	350	142	153	60	78	4	207	9	1,862	9	10.71	1.46	7.33	1.12	30.7	4.2	0.89	.253	2.86	62	2.84	68	6.55	69.2
22	Tom Henke T. Henke	2.67	789.2	642	41	42	.494	0	861	0	0	311	607	234	252	64	255	9	548	29	3,194	30	9.81	2.91	3.38	0.73	27.0	8.0	1.09	.271	2.87	64	2.71	66	6.92	123.5
23	Dave Smith D. Smith	2.67	809.1	609	53	53	.500	1	548	0	0	216	700	240	280	34	283	13	432	64	3,357	28	6.09	3.15	1.94	0.38	16.3	8.4	1.21	.269	3.11	77	3.03	87	7.78	40.2
24	Jason Adam J. Adam	2.69	335.0	341	27	15	.643	0	390	0	0	24	220	100	115	34	124	33	77	11	1,352	14	10.48	3.33	3.15	0.91	28.8	9.2	1.03	.241	3.09	65	3.56	87	5.91	19.2
25	Bob Lee B. Lee	2.71	492.0	269	25	23	.521	7	315	0	0	64	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