lowest career era with at least 900 ip since 1920

Since 1920, Mariano Rivera has the best ERA when pitching at least 900 innings, with an ERA of 2.21.

Interpreted as:

lowest career era by a player with at least 900 ip since 1920

	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	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
4	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
5	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
6	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
7	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
8	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
9	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
10	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
11	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
12	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
13	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
14	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
15	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
16	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
17	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
18	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
19	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
20	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
21	Sparky Lyle S. Lyle	2.88	1390.1	899	99	76	.566	0	873	0	0	238	1,292	445	519	84	481	14	634	81	5,794	66	5.65	3.11	1.81	0.54	15.1	8.3	1.28	.278	3.36	79	3.19	86	8.36	81.4
22	Juan Marichal J. Marichal	2.89	3507.0	471	243	142	.631	457	2,303	244	52	2	3,153	1,126	1,329	320	709	40	11	82	14,236	51	5.91	1.82	3.25	0.82	16.2	5.0	1.10	.261	3.41	81	3.04	88	8.09	154.8
23	John Franco J. Franco	2.89	1245.2	1,119	90	87	.508	0	975	0	0	424	1,166	400	466	81	495	22	774	78	5,312	54	7.04	3.58	1.97	0.59	18.4	9.3	1.33	.290	3.37	73	3.44	86	8.42	76
24	Rollie Fingers R. Fingers	2.90	1701.1	944	114	118	.491	37	1,299	4	2	341	1,474	549	615	123	492	39	709	109	6,942	40	6.87	2.60	2.64	0.65	18.7	7.1	1.16	.271	3.25	83	2.95	82	7.80	125.4
25	Bob Gibson B. Gibson	2.91	3884.1	528	251	174	.591	482	3,117	255	56	6	3,279	1,258	1,420	257	1,336	102	21	118	16,068	108	7.22	3.10	2.33	0.60	19.4	8.3	1.19	.268	3.29	78	2.89	81	7.60	290.5