starting pitcher with most seasons with an era below 2.5

Grover Alexander and Walter Johnson were tied for playing the most seasons by a starting pitcher with an ERA better than 2.50, with 20 seasons.

	NAME	SEAS	ERA	G	W	L	W%	GS	SO	CG	SHO	SV	IP	H	ER	R	HR	BB	HBP	GF	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	H/9
1	Grover Alexander G. Alexander	20	2.37	600	350	193	.645	600	2,096	437	90	0	4978.1	4,654		1,742	156	887	66	0	20,045	33	3.79	1.60	2.36	0.28	10.5	4.4	1.11	.267	3.15	8.41
2	Walter Johnson W. Johnson	20	1.72	654	371	242	.605	654	3,207	520	108	0	5447.0	4,516		1,736	89	1,276	190	0	21,802	140	5.30	2.11	2.51	0.15	14.7	5.9	1.06	.260	2.87	7.46
3	Babe Adams B. Adams	16	2.24	351	173	120	.590	351	905	204	44	0	2637.1	2,476		939	52	353	34	0	10,525	22	3.09	1.20	2.56	0.18	8.6	3.4	1.07	.264	3.20	8.45
4	Slim Sallee S. Sallee	13	1.88	306	145	122	.543	306	676	191	25	0	2362.0	2,298		891	53	467	35	0	9,602	8	2.58	1.78	1.45	0.20	7.0	4.9	1.17	.268	3.40	8.76
5	Eddie Cicotte E. Cicotte	13	1.62	360	183	135	.575	360	1,225	247	35	0	2846.2	2,586		1,033	29	722	43	0	11,543	51	3.87	2.28	1.70	0.09	10.6	6.3	1.16	.268	3.27	8.18
6	Hippo Vaughn H. Vaughn	12	1.90	332	167	126	.570	332	1,309	214	41	0	2560.0	2,295		941	35	742	85	0	10,541	53	4.60	2.61	1.76	0.12	12.4	7.0	1.19	.270	3.31	8.07
7	Red Ames R. Ames	12	1.86	274	112	118	.487	274	933	143	20	0	2013.2	1,901		834	29	583	38	0	8,312	67	4.17	2.61	1.60	0.13	11.2	7.0	1.23	.278	3.73	8.50
8	Willie Mitchell W. Mitchell	11	2.03	190	73	83	.468	190	769	93	16	0	1386.1	1,270		616	13	525	54	0	5,839	35	4.99	3.41	1.46	0.08	13.2	9.0	1.29	.281	4.00	8.24
9	Jack Coombs J. Coombs	11	1.13	234	121	82	.596	234	811	164	32	0	1804.2	1,581		690	27	624	73	0	7,458	38	4.04	3.11	1.30	0.13	10.9	8.4	1.22	.262	3.44	7.88
10	Babe Ruth B. Ruth	10	2.23	147	92	43	.681	147	475	107	17	0	1166.2	929	289	375	9	421	29	0	4,752	25	3.66	3.25	1.13	0.07	10.0	8.9	1.16	.241	2.89	7.17
11	Ray Fisher R. Fisher	10	2.18	207	90	90	.500	207	551	110	19	0	1545.0	1,456		625	31	426	42	0	6,325	23	3.21	2.48	1.29	0.18	8.7	6.7	1.22	.270	3.64	8.48
12	Bob Groom B. Groom	10	1.85	288	110	140	.440	288	1,027	157	22	0	2068.0	1,973		945	44	667	52	0		52	4.47	2.90	1.54	0.19		8.4	1.28	.311	4.11	8.59
13	Chief Bender C. Bender	10	1.26	207	122	61	.667	207	912	146	26	0	1663.0	1,470		547	18	363	42	0		35	4.94	1.96	2.51	0.10		5.6	1.10	.283	2.96	7.96
14	Eddie Plank E. Plank	10	1.12	276	150	88	.630	276	1,036	192	40	0	2119.0	1,831		676	17	521	63	0		33	4.40	2.21	1.99	0.07		6.2	1.11	.271	2.87	7.78
15	Ed Walsh E. Walsh	10	0.40	217	122	78	.610	217	1,094	174	40	0	1835.1	1,442		505	16	376	31	0	7,201	39	5.36	1.84	2.91	0.08	15.2	5.2	0.99	.251	2.48	7.07
16	Ed Reulbach E. Reulbach	10	1.40	225	115	76	.602	225	682	136	25	0	1696.2	1,432		616	25	573	60	0		29	3.62	3.04	1.19	0.13		8.5	1.18	.262	3.27	7.60
17	Bob Harmon B. Harmon	9	2.17	239	95	117	.448	239	568	143	15	0	1832.1	1,740		829	38	679	32	0	7,609	34	2.79	3.34	0.84	0.19	7.5	8.9	1.32	.271	4.07	8.55
18	Jim Scott J. Scott	9	1.40	226	90	92	.495	226	823	122	26	0	1611.2	1,397		559	20	509	43	0	6,506	21	4.60	2.84	1.62	0.11	12.6	7.8	1.18	.269	3.12	7.80
19	Joe Wood J. Wood	9	0.76	158	97	49	.664	158	863	121	28	0	1274.0	999		433	10	372	47	0	5,120	34	6.10	2.63	2.32	0.07	16.9	7.3	1.08	.258	3.06	7.06
20	Jean Dubuc J. Dubuc	9	2.28	150	68	63	.519	150	358	101	12	0	1150.1	1,043		535	14	444	39	0	4,845	40	2.80	3.47	0.81	0.11	7.4	9.2	1.29	.258	4.19	8.16
21	Mordecai Brown M. Brown	9	1.27	202	121	69	.637	202	690	160	31	0	1657.0	1,443		542	23	346	33	0		25	3.75	1.88	1.99	0.12		5.6	1.08	.277	2.94	7.84
22	Doc Crandall D. Crandall	9	1.64	134	69	47	.595	134	380	91	9	0	1034.1	1,062		447	36	253	25	0		6	3.31	2.20	1.50	0.31		6.3	1.27	.309	3.89	9.24
23	Bill Bailey B. Bailey	9	1.89	112	26	66	.283	112	437	67	8	0	765.1	719		410	16	373	35	0		34	5.14	4.39	1.17	0.19		13.3	1.43	.360	4.82	8.46
24	Christy Mathewson C. Mathewson	9	1.26	284	179	87	.673	284	1,051	213	37	0	2330.2	2,138		756	55	266	10	0	9,187	30	4.06	1.03	3.95	0.21	11.4	2.9	1.03	.267	2.92	8.26
25	George McQuillan G. McQuillan	9	1.34	168	73	77	.487	168	457	100	14	0	1272.1	1,138		459	19	318	19	0	5,105	11	3.23	2.25	1.44	0.13	9.0	6.2	1.14	.261	3.25	8.05