what pitcher has the lowest career era with at least 4000 ip

Christy Mathewson has the best career ERA when pitching at least 4000 innings, with an ERA of 2.13.

	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	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
2	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
3	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
4	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
5	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
6	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
7	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
8	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
9	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
10	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
11	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
12	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
13	Kid Nichols K. Nichols	2.96	5067.1	621	361	208	.634	562	1,881	532	48	17	4,929	1,664	2,480	156	1,272	129	56		21,082	169	3.34	2.26	1.48	0.28	8.9	6.0	1.22	.271	4.40	73	3.48	85	8.75	377.8
14	Jack Powell J. Powell	2.97	4389.0	578	245	254	.491	516	1,621	422	46	15	4,319	1,450	1,991	110	1,021	120	57		17,896	67	3.32	2.09	1.59	0.23	9.1	5.7	1.22	.280	4.08	95	3.01	97	8.86	35
15	Tony Mullane T. Mullane	3.05	4531.1	555	284	220	.563	504	1,803	468	30	15	4,195	1,537	2,523	97	1,408	135	52		19,407	343	3.58	2.80	1.28	0.19	9.3	7.3	1.24	.258	5.01	85	3.54	99	8.33	25.1
16	Warren Spahn W. Spahn	3.09	5243.2	750	363	245	.597	665	2,583	382	63	28	4,830	1,798	2,016	434	1,434	42	67	60	21,547	81	4.43	2.46	1.80	0.74	12.0	6.7	1.19	.258	3.46	84	3.44	94	8.29	124.4
17	Gaylord Perry G. Perry	3.11	5350.0	777	314	265	.542	690	3,534	303	53	10	4,938	1,846	2,128	399	1,379	108	33	164	21,953	160	5.95	2.32	2.56	0.67	16.1	6.3	1.18	.275	3.58	85	3.06	85	8.31	312.9
18	Roger Clemens R. Clemens	3.12	4916.2	709	354	184	.658	707	4,672	118	46	0	4,185	1,707	1,885	363	1,580	159	0	63	20,240	143	8.55	2.89	2.96	0.66	23.1	7.8	1.17	.284	3.45	70	3.08	71	7.66	680.4
19	Eppa Rixey E. Rixey	3.15	4494.2	692	266	251	.515	554	1,350	290	37	14	4,633	1,572	1,986	93	1,082	76	99		18,754	97	2.70	2.17	1.25	0.19	7.2	5.8	1.27	.281	3.98	88	3.29	91	9.28	162.7
20	Red Faber R. Faber	3.15	4086.2	669	254	213	.544	483	1,471	273	29	27	4,106	1,430	1,813	111	1,213	103	134		17,104	52	3.24	2.67	1.21	0.24	8.6	7.1	1.30	.281	3.99	84	3.43	93	9.04	124.6
21	Greg Maddux G. Maddux	3.16	5008.1	744	355	227	.610	740	3,371	109	35	0	4,726	1,756	1,981	353	999	137	3	177	20,421	70	6.06	1.80	3.37	0.63	16.5	4.9	1.14	.281	3.56	76	3.25	78	8.49	519.5
22	Nolan Ryan N. Ryan	3.19	5386.0	807	324	292	.526	773	5,714	222	61	3	3,923	1,911	2,178	321	2,795	158	13	78	22,575	277	9.55	4.67	2.04	0.54	25.3	12.4	1.25	.265	3.64	90	2.96	83	6.56	370.2
23	Steve Carlton S. Carlton	3.22	5217.2	741	329	244	.574	709	4,136	254	55	2	4,672	1,864	2,130	414	1,833	53	13	150	21,683	183	7.13	3.16	2.26	0.71	19.1	8.5	1.25	.279	3.67	87	3.14	86	8.06	271.5
24	Don Sutton D. Sutton	3.26	5282.1	774	324	256	.559	756	3,574	178	58	5	4,692	1,914	2,104	472	1,343	82	12	102	21,631	112	6.09	2.29	2.66	0.80	16.5	6.2	1.14	.261	3.58	92	3.23	90	7.99	181.2
25	Randy Johnson R. Johnson	3.29	4135.1	618	303	166	.646	603	4,875	100	37	2	3,346	1,513	1,703	411	1,497	190	7	37	17,067	109	10.61	3.26	3.26	0.89	28.6	8.8	1.17	.291	3.71	75	3.18	73	7.28	554.3