who has the lowest earned run average lifetime mlb after 1920 minimum 800 innings pitched

Since 1921, Mariano Rivera has the lowest ERA when pitching at least 800 innings, with an ERA of 2.21.

	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	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
2	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
3	Clayton Kershaw C. Kershaw	2.52	2808.1	445	217	96	.693	442	3,010	25	15	0	2,155	786	863	233	696	46	1	28	11,089	107	9.65	2.23	4.32	0.75	27.1	6.3	1.02	.271	2.77	64	2.84	70	6.91	368.6
4	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
5	Jacob deGrom J. deGrom	2.55	1495.2	240	94	61	.606	240	1,801	4	2	0	1,143	423	460	139	337	24	0	13	5,875	28	10.84	2.03	5.34	0.84	30.7	5.7	0.99	.281	2.77	65	2.67	66	6.88	235.8
6	Aroldis Chapman A. Chapman	2.55	803.2	844	58	46	.558	0	1,310	0	0	355	468	228	253	54	406	33	547	7	3,278	84	14.67	4.55	3.23	0.60	40.0	12.4	1.09	.281	2.83	62	2.38	57	5.24	155.7
7	Kenley Jansen K. Jansen	2.58	909.1	916	53	38	.582	0	1,260	0	0	466	605	261	280	86	275	31	685	20	3,614	21	12.47	2.72	4.58	0.85	34.9	7.6	0.97	.265	2.77	65	2.60	64	5.99	146.4
8	Craig Kimbrel C. Kimbrel	2.59	810.2	838	56	47	.544	0	1,266	0	0	440	483	233	259	73	340	40	651	11	3,260	70	14.06	3.77	3.72	0.81	38.8	10.4	1.02	.266	2.88	63	2.58	63	5.36	131.9
9	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
10	Whitey Ford W. Ford	2.75	3170.1	498	236	106	.690	438	1,956	156	45	11	2,766	967	1,107	228	1,086	28	35	44	13,036	75	5.55	3.08	1.80	0.65	15.0	8.3	1.22	.261	3.14	75	3.26	88	7.85	156.9
11	Bob Locker B. Locker	2.75	879.0	576	57	39	.594	0	577	0	0	95	776	269	329	40	257	36	288	80	3,643	37	5.91	2.63	2.25	0.41	15.8	7.1	1.18	.269	3.37	82	2.79	80	7.95	68.1
12	Dan Quisenberry D. Quisenberry	2.76	1043.1	674	56	46	.549	0	379	0	0	244	1,064	320	356	59	162	7	553	70	4,247	4	3.27	1.40	2.34	0.51	8.9	3.8	1.18	.276	3.07	69	3.23	82	9.18	81.6
13	Sandy Koufax S. Koufax	2.76	2324.1	397	165	87	.655	314	2,396	137	40	9	1,754	713	806	204	817	18	44	48	9,497	87	9.28	3.16	2.93	0.79	25.2	8.6	1.11	.256	3.12	75	2.69	75	6.79	226.6
14	Ron Perranoski R. Perranoski	2.79	1174.2	737	79	74	.516	1	687	0	0	178	1,097	364	442	50	468	24	458	121	5,023	28	5.26	3.59	1.47	0.38	13.7	9.3	1.33	.276	3.39	82	3.17	93	8.40	30.6
15	Bruce Sutter B. Sutter	2.83	1042.0	661	68	71	.489	0	861	0	0	300	879	328	370	77	309	13	512	83	4,251	37	7.44	2.67	2.79	0.67	20.3	7.3	1.14	.268	3.20	75	2.93	80	7.59	88
16	John Hiller J. Hiller	2.83	1242.0	545	87	76	.534	43	1,036	13	6	125	1,040	391	438	110	535	12	363	71	5,206	39	7.51	3.88	1.94	0.80	19.9	10.3	1.27	.265	3.17	75	3.38	89	7.54	58.9
17	Spud Chandler S. Chandler	2.84	1485.0	211	109	43	.717	184	614	109	26	6	1,327	468	549	64	463	19	14		6,102	20	3.72	2.81	1.33	0.39	10.1	7.6	1.21	.256	3.33	73	3.30	88	8.04	71.2
18	Kent Tekulve K. Tekulve	2.85	1436.2	1,050	94	90	.511	0	779	0	0	184	1,305	455	526	63	491	17	638	179	6,001	23	4.88	3.08	1.59	0.39	13.0	8.2	1.25	.267	3.30	77	3.25	88	8.18	71.1
19	Frank Linzy F. Linzy	2.85	817.1	516	62	57	.521	2	358	0	0	110	790	259	315	35	282	14	342	97	3,454	30	3.94	3.11	1.27	0.39	10.4	8.2	1.31	.273	3.47	81	3.27	97	8.70	10.3
20	Jim Palmer J. Palmer	2.86	3948.0	558	268	152	.638	521	2,212	211	53	4	3,349	1,253	1,395	303	1,311	38	15	37	16,114	85	5.04	2.99	1.69	0.69	13.7	8.1	1.18	.249	3.18	80	3.50	95	7.63	83.2
21	Francisco Rodriguez F. Rodriguez	2.86	976.0	948	52	53	.495	0	1,142	0	0	437	738	310	336	98	389	17	677	42	4,011	68	10.53	3.59	2.94	0.90	28.5	9.7	1.15	.271	3.10	69	3.30	79	6.81	97
22	Andy Messersmith A. Messersmith	2.86	2230.1	344	130	99	.568	295	1,625	98	27	14	1,719	709	812	174	831	40	30	44	9,120	70	6.56	3.35	1.96	0.70	17.8	9.1	1.14	.240	3.28	83	3.28	92	6.94	68.3
23	Tom Seaver T. Seaver	2.86	4783.0	656	311	205	.603	647	3,640	231	61	1	3,971	1,521	1,674	380	1,390	76	6	116	19,369	126	6.85	2.62	2.62	0.72	18.8	7.2	1.12	.259	3.15	79	3.03	85	7.47	286.1
24	Joe Nathan J. Nathan	2.87	923.1	787	64	34	.653	29	976	0	0	377	690	294	317	84	344	23	587	31	3,771	47	9.51	3.35	2.84	0.82	25.9	9.1	1.12	.259	3.09	67	3.35	78	6.73	93.6
25	Trevor Hoffman T. Hoffman	2.87	1089.1	1,035	61	75	.449	0	1,133	0	0	601	846	347	378	100	307	9	856	58	4,388	49	9.36	2.54	3.69	0.83	25.8	7.0	1.06	.263	3.12	71	3.07	73	6.99	143.1