who has the lowest era in history with at least 3000 innings pitched

Mordecai Brown has the best career ERA when pitching at least 3000 innings, with an ERA of 2.06.

	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	Mordecai Brown M. Brown	2.06	3172.1	481	239	130	.648	332	1,375	271	55	49	2,708	725	1,044	43	673	61	138		12,422	61	3.90	1.91	2.04	0.12	11.1	5.4	1.07	.259	2.96	71	2.42	83	7.68	161.9
2	Christy Mathewson C. Mathewson	2.13	4788.2	636	373	188	.665	552	2,507	435	79	30	4,219	1,135	1,620	89	848	59	73		18,913	115	4.71	1.59	2.96	0.17	13.3	4.5	1.06	.268	3.04	75	2.26	76	7.93	363
3	Walter Johnson W. Johnson	2.17	5914.1	802	417	279	.599	666	3,509	531	110	34	4,913	1,424	1,902	97	1,363	205	127		23,405	154	5.34	2.07	2.57	0.15	15.0	5.8	1.06	.264	2.89	68	2.42	76	7.48	472.8
4	Will White W. White	2.28	3542.2	403	229	166	.580	402	1,041	394	36	0	3,440	896	1,844	65	496		1		14,951	221	2.64	1.26	2.10	0.17	7.0	3.3	1.11	.254	4.68	83	2.98	108	8.74	-109.3
5	Eddie Plank E. Plank	2.35	4495.2	623	326	194	.627	529	2,246	410	69	23	3,958	1,174	1,566	42	1,072	190	77		17,803	88	4.50	2.15	2.10	0.08	12.6	6.0	1.12	.275	3.14	81	2.45	86	7.92	195.2
6	Eddie Cicotte E. Cicotte	2.38	3226.0	502	209	148	.585	361	1,374	249	35	24	2,897	853	1,161	32	827	52	107		12,731	57	3.83	2.31	1.66	0.09	10.8	6.5	1.15	.274	3.24	82	2.54	88	8.08	131.9
7	Doc White D. White	2.39	3041.0	427	189	156	.548	363	1,384	262	45	5	2,738	808	1,118	33	670	120	53		12,093	63	4.10	1.98	2.07	0.10	11.4	5.5	1.12	.274	3.31	89	2.51	96	8.10	22.9
8	Jim McCormick J. McCormick	2.43	4275.2	492	265	214	.553	485	1,704	466	33	1	4,092	1,155	2,095	82	749	12	7		17,702	160	3.59	1.58	2.28	0.17	9.6	4.2	1.13	.265	4.41	86	2.88	100	8.61	-32.7
9	Chief Bender C. Bender	2.46	3017.0	459	212	127	.625	334	1,711	255	40	34	2,645	823	1,108	40	712	102	112		11,895	79	5.10	2.12	2.40	0.12	14.4	6.0	1.11	.279	3.31	88	2.29	83	7.89	145.9
10	Grover Alexander G. Alexander	2.56	5190.0	696	373	208	.642	600	2,198	436	90	32	4,868	1,476	1,852	165	951	70	81		20,893	38	3.81	1.65	2.31	0.29	10.5	4.6	1.12	.269	3.21	73	2.88	81	8.44	359.1
11	Cy Young C. Young	2.63	7356.0	906	511	316	.618	815	2,803	749	76	17	7,092	2,147	3,167	138	1,217	161	84		29,565	156	3.43	1.49	2.30	0.17	9.5	4.1	1.13	.275	3.87	74	2.84	79	8.68	620
12	Tim Keefe T. Keefe	2.63	5049.2	600	342	225	.603	594	2,564	554	39	2	4,438	1,474	2,470	75	1,233	83	7		20,941	240	4.57	2.20	2.08	0.13	12.2	5.9	1.12	.257	4.40	79	2.92	87	7.91	239.2
13	Vic Willis V. Willis	2.63	3996.0	513	249	205	.548	471	1,651	388	50	11	3,621	1,167	1,620	66	1,212	156	41		16,263	94	3.72	2.73	1.36	0.15	10.2	7.5	1.21	.270	3.65	86	2.96	95	8.16	82
14	Red Ames R. Ames	2.63	3198.0	533	183	167	.523	371	1,702	209	27	36	2,896	934	1,313	41	1,034	64	118		13,080	156	4.79	2.91	1.65	0.12	13.0	7.9	1.23	.279	3.70	93	2.54	88	8.15	121.5
15	Joe McGinnity J. McGinnity	2.66	3441.1	465	246	142	.634	381	1,068	314	32	24	3,276	1,016	1,436	52	812	179	73		14,132	30	2.79	2.12	1.32	0.14	7.6	5.7	1.19	.268	3.76	85	3.04	95	8.57	68.9
16	Old Hoss Radbourn O. Hoss Radbourn	2.68	4527.1	527	309	194	.614	502	1,830	488	35	3	4,328	1,347	2,273	118	875	54	24		18,918	214	3.64	1.74	2.09	0.23	9.7	4.6	1.15	.262	4.52	82	3.15	95	8.60	51
17	Mickey Welch M. Welch	2.71	4802.0	565	307	210	.594	549	1,850	525	41	4	4,588	1,447	2,556	106	1,297	52	16		20,308	274	3.47	2.43	1.43	0.20	9.1	6.4	1.23	.264	4.79	88	3.28	103	8.60	-55.7
18	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
19	John Clarkson J. Clarkson	2.81	4536.1	531	328	178	.648	518	1,978	485	37	5	4,295	1,417	2,384	159	1,191	80	12		19,146	182	3.92	2.36	1.66	0.32	10.3	6.2	1.21	.263	4.73	75	3.35	88	8.52	289.8
20	George Mullin G. Mullin	2.82	3686.2	487	228	196	.538	428	1,482	353	35	8	3,518	1,156	1,636	42	1,238	130	51		15,179	85	3.62	3.02	1.20	0.10	9.8	8.2	1.29	.283	3.99	99	2.91	104	8.59	-39
21	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
22	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
23	Pud Galvin P. Galvin	2.87	5941.1	697	361	308	.540	681	1,799	639	57	1	6,352	1,895	3,315	121	744	54	18		25,160	220	2.73	1.13	2.42	0.18	7.2	3.0	1.19	.278	5.02	94	2.97	95	9.62	94.5
24	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
25	Stan Coveleski S. Coveleski	2.89	3082.0	450	215	142	.602	385	981	223	38	21	3,055	990	1,227	66	802	30	52		12,729	35	2.86	2.34	1.22	0.19	7.7	6.3	1.25	.275	3.58	79	3.19	87	8.92	162.2