lowest all-time era- with a minimum of 100 games started

Jacob deGrom has the best career ERA- when starting 100+ games, with an ERA- of 64.

Interpreted as:

lowest all-time era- by a player with a minimum of 100 games started

	NAME	ERA-	GS	G	W	L	W%	ERA	SO	CG	SHO	SV	IP	H	ER	R	HR	BB	HBP	GF	IBB	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	FIP	FIP-	H/9	PRAA
1	Jacob deGrom J. deGrom	64	235	235	93	59	.612	2.49	1,766	4	2	0	1468.1	1,120	407	444	130	329	24	0	13	5,762	28	10.82	2.02	5.37	0.80	30.6	5.7	0.99	.282	2.72	2.62	64	6.86	240
2	Clayton Kershaw C. Kershaw	64	437	440	216	94	.697	2.51	2,997	25	15	0	2781.1	2,124	775	850	232	691	44	1	28	10,972	105	9.70	2.24	4.34	0.75	27.3	6.3	1.01	.270	2.75	2.84	70	6.87	366.1
3	Pedro Martinez P. Martinez	66	409	476	219	100	.687	2.93	3,154	46	17	3	2827.1	2,221	919	1,006	239	760	141	23	30	11,394	62	10.04	2.42	4.15	0.76	27.7	6.7	1.05	.279	3.20	2.91	68	7.07	454.6
4	Jim Devlin J. Devlin	67	129	129	65	60	.520	1.89	263	127	9	0	1181.0	1,183	248	597	7	78		0		4,896	34	2.00	0.59	3.37	0.05	5.4	1.6	1.07		4.55	2.35	84	9.02	88.9
5	Walter Johnson W. Johnson	68	666	802	417	279	.599	2.17	3,509	531	110	34	5914.1	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	2.42	76	7.48	472.8
6	Lefty Grove L. Grove	68	457	616	300	141	.680	3.06	2,266	298	35	54	3940.2	3,849	1,339	1,594	162	1,187	42	123		16,622	51	5.18	2.71	1.91	0.37	13.6	7.1	1.28	.284	3.64	3.36	76	8.79	462.8
7	Ed Walsh E. Walsh	69	315	430	195	126	.607	1.82	1,736	250	57	35	2964.1	2,346	598	873	23	617	52	105		11,413	76	5.27	1.87	2.81	0.07	15.2	5.4	1.00	.259	2.65	2.02	79	7.12	164.3
8	Max Fried M. Fried	70	169	186	83	38	.686	2.97	969	6	4	0	998.1	867	329	365	85	269	41	10	6	4,062	43	8.74	2.43	3.60	0.77	23.9	6.6	1.14	.290	3.29	3.25	78	7.82	100.7
9	Joe Wood J. Wood	70	158	225	117	57	.672	2.03	989	121	28	10	1434.1	1,138	324	497	10	421	49	56		5,640	43	6.21	2.64	2.35	0.06	17.5	7.5	1.09	.270	3.12	2.26	78	7.14	105.8
10	Addie Joss A. Joss	70	260	286	160	97	.623	1.89	920	234	45	5	2327.0	1,888	488	730	19	364	58	22		8,891	28	3.56	1.41	2.53	0.07	10.3	4.1	0.97	.248	2.82	2.25	86	7.30	88.8
11	Roger Clemens R. Clemens	70	707	709	354	184	.658	3.12	4,672	118	46	0	4916.2	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	3.08	71	7.66	680.4
12	Mordecai Brown M. Brown	71	332	481	239	130	.648	2.06	1,375	271	55	49	3172.1	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	2.42	83	7.68	161.9
13	Chris Sale C. Sale	71	307	387	143	87	.622	3.02	2,528	16	3	12	2047.2	1,668	686	739	209	481	126	25	15	8,249	47	11.11	2.11	5.26	0.92	30.6	5.8	1.05	.297	3.25	2.88	69	7.33	296.7
14	Brandon Webb B. Webb	72	198	199	87	62	.584	3.27	1,065	15	8	0	1319.2	1,200	479	557	92	435	50	1	34	5,515	56	7.26	2.97	2.45	0.63	19.3	7.9	1.24	.286	3.80	3.49	78	8.18	146.6
15	Grover Alexander G. Alexander	73	600	696	373	208	.642	2.56	2,198	436	90	32	5190.0	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	2.88	81	8.44	359.1
16	Brandon Woodruff B. Woodruff	73	115	130	46	26	.639	3.10	788	2	1	1	680.1	535	234	243	75	176	29	4	1	2,727	7	10.42	2.33	4.48	0.99	28.9	6.5	1.05	.277	3.21	3.19	75	7.08	81.7
17	Spud Chandler S. Chandler	73	184	211	109	43	.717	2.84	614	109	26	6	1485.0	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	3.30	88	8.04	71.2
18	Kid Nichols K. Nichols	73	562	621	361	208	.634	2.96	1,881	532	48	17	5067.1	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	3.48	85	8.75	377.8
19	Cy Young C. Young	74	815	906	511	316	.618	2.63	2,803	749	76	17	7356.0	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	2.84	79	8.68	620
20	Johan Santana J. Santana	74	284	360	139	78	.641	3.20	1,988	15	10	1	2025.2	1,726	721	773	220	567	36	23	13	8,262	68	8.83	2.52	3.51	0.98	24.1	6.9	1.13	.276	3.43	3.43	81	7.67	187.6
21	Christy Mathewson C. Mathewson	75	552	636	373	188	.665	2.13	2,507	435	79	30	4788.2	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	2.26	76	7.93	363
22	Sandy Koufax S. Koufax	75	314	397	165	87	.655	2.76	2,396	137	40	9	2324.1	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	2.69	75	6.79	226.6
23	Noodles Hahn N. Hahn	75	231	243	130	94	.580	2.55	917	212	25	0	2029.1	1,916	574	821	27	381	52	11		8,126	28	4.07	1.69	2.41	0.12	11.3	4.7	1.13	.280	3.64	2.65	77	8.50	181.2
24	Whitey Ford W. Ford	75	438	498	236	106	.690	2.75	1,956	156	45	11	3170.1	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	3.26	88	7.85	156.9
25	Harry Brecheen H. Brecheen	75	240	318	133	92	.591	2.92	901	125	25	18	1907.2	1,731	618	701	116	536	37	53		7,821	18	4.25	2.53	1.68	0.55	11.5	6.9	1.19	.259	3.31	3.26	84	8.17	135.3