most seasons with 15 wins and an era under 3.25 by pitcher since 1947

Since 1947, Warren Spahn has played the most seasons with 15+ pitcher wins with an ERA better than 3.25, with 13 seasons.

Interpreted as:

most seasons with 15 or more wins and an era under 3.25 by pitcher since 1947

	NAME	SEAS	W	ERA	L	W%	G	GS	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	ERA-	FIP	FIP-	H/9	PRAA
1	Warren Spahn W. Spahn	13	275	2.85	156	.638	493	457	1,780	292	49	16	3670.2	3,281	1,162	1,304	292	990	23	28	41	14,960	55	4.36	2.43	1.80	0.72	11.9	6.6	1.16	.252	3.20	77	3.40	92	8.04	124.7
2	Greg Maddux G. Maddux	12	216	2.49	99	.686	398	398	2,042	81	29	0	2844.1	2,443	787	885	145	546	82	0	105	11,350	34	6.46	1.73	3.74	0.46	18.0	4.8	1.05	.269	2.80	61	2.89	70	7.73	393.6
3	Tom Seaver T. Seaver	12	226	2.55	122	.649	423	416	2,585	178	43	1	3186.1	2,568	902	1,007	237	866	49	5	72	12,771	79	7.30	2.45	2.98	0.67	20.2	6.8	1.08	.258	2.84	71	2.76	79	7.25	265.7
4	Gaylord Perry G. Perry	11	209	2.72	145	.590	416	410	2,189	221	37	3	3255.0	2,783	984	1,145	208	794	61	5	98	13,117	80	6.05	2.20	2.76	0.58	16.7	6.1	1.10	.261	3.17	78	2.80	81	7.69	233.8
5	Roger Clemens R. Clemens	10	195	2.62	80	.709	337	337	2,454	95	38	0	2512.1	2,016	731	822	145	721	73	0	39	10,130	58	8.79	2.58	3.40	0.52	24.2	7.1	1.09	.278	2.94	61	2.62	63	7.22	427.1
6	Jim Palmer J. Palmer	10	200	2.53	94	.680	368	359	1,634	182	50	3	2818.2	2,281	791	872	193	876	28	4	29	11,338	59	5.22	2.80	1.87	0.62	14.4	7.7	1.12	.243	2.78	71	3.27	89	7.28	125.6
7	Whitey Ford W. Ford	10	186	2.82	75	.713	362	335	1,519	119	31	9	2400.0	2,104	752	840	172	821	21	19	27	9,872	57	5.70	3.08	1.85	0.65	15.4	8.3	1.22	.263	3.15	77	3.23	87	7.89	127.1
8	Steve Carlton S. Carlton	9	181	2.71	100	.644	329	329	2,161	141	30	0	2540.0	2,145	765	870	179	800	24	0	65	10,322	79	7.66	2.83	2.70	0.63	20.9	7.8	1.16	.275	3.08	74	2.81	77	7.60	229
9	Bob Gibson B. Gibson	9	175	2.57	102	.632	313	305	2,152	194	47	3	2536.2	2,029	723	813	158	771	66	6	73	10,299	70	7.64	2.74	2.79	0.56	20.9	7.5	1.10	.262	2.88	69	2.62	74	7.20	252.5
10	Randy Johnson R. Johnson	8	154	2.57	55	.737	270	267	2,600	56	21	1	1958.1	1,455	560	637	170	573	88	2	12	7,832	40	11.95	2.63	4.54	0.78	33.2	7.3	1.04	.292	2.93	57	2.54	56	6.69	428.3
11	Bert Blyleven B. Blyleven	8	138	2.80	104	.570	292	290	1,699	136	37	0	2227.0	1,966	694	783	153	549	60	1	24	9,038	41	6.87	2.22	3.09	0.62	18.8	6.1	1.13	.276	3.16	75	2.77	73	7.95	248
12	Zack Greinke Z. Greinke	7	117	2.62	46	.718	223	223	1,398	9	4	0	1450.2	1,213	423	460	131	298	28	0	10	5,746	47	8.67	1.85	4.69	0.81	24.3	5.2	1.04	.278	2.85	65	3.05	76	7.53	161.1
13	Roy Halladay R. Halladay	7	134	2.82	56	.705	233	232	1,357	50	14	0	1694.2	1,577	531	595	129	267	48	0	20	6,816	26	7.21	1.42	5.08	0.69	19.9	3.9	1.09	.289	3.16	64	3.00	69	8.38	245.7
14	Tom Glavine T. Glavine	7	131	2.85	59	.689	237	237	1,033	30	13	0	1599.0	1,450	507	574	96	532	21	0	37	6,608	31	5.81	2.99	1.94	0.54	15.6	8.1	1.24	.275	3.23	71	3.52	86	8.16	100.5
15	Don Sutton D. Sutton	7	127	2.75	72	.638	248	246	1,291	86	30	1	1842.0	1,511	563	633	121	462	27	2	25	7,410	42	6.31	2.26	2.79	0.59	17.4	6.2	1.07	.252	3.09	81	2.80	81	7.38	130.5
16	Phil Niekro P. Niekro	7	124	2.87	93	.571	276	256	1,253	114	21	5	1963.1	1,785	625	737	149	518	46	14	27	8,078	67	5.74	2.37	2.42	0.68	15.5	6.4	1.17	.268	3.38	75	3.11	83	8.18	133.9
17	Fergie Jenkins F. Jenkins	7	148	2.92	88	.627	271	266	1,598	161	31	1	2100.1	1,840	681	753	192	404	38	4	48	8,432	27	6.85	1.73	3.96	0.82	19.0	4.8	1.07	.266	3.23	80	2.78	79	7.88	171.5
18	Mel Stottlemyre M. Stottlemyre	7	123	2.84	91	.575	258	258	912	123	28	0	1941.1	1,750	612	708	130	570	33	0	49	7,967	39	4.23	2.64	1.60	0.60	11.4	7.2	1.20	.256	3.28	85	3.37	98	8.11	13.6
19	Juan Marichal J. Marichal	7	158	2.38	66	.705	262	257	1,498	164	40	1	2097.1	1,735	555	666	167	351	27	5	43	8,299	30	6.43	1.51	4.27	0.72	18.1	4.2	0.99	.251	2.86	70	2.64	80	7.45	151.9
20	Jim Kaat J. Kaat	7	135	3.00	89	.603	288	270	1,198	95	16	3	1925.1	1,865	641	778	159	435	59	7	25	7,981	54	5.60	2.03	2.75	0.74	15.0	5.5	1.19	.278	3.64	81	3.17	84	8.72	122.7
21	Early Wynn E. Wynn	7	143	2.93	74	.659	258	234	1,043	122	27	9	1807.2	1,499	588	671	140	713	25	23	15	7,517	21	5.19	3.55	1.46	0.70	13.9	9.5	1.22	.243	3.34	76	3.52	92	7.46	59.1
22	Max Scherzer M. Scherzer	6	108	2.76	32	.771	193	193	1,580	7	2	0	1263.2	908	388	411	135	317	49	0	9	4,981	28	11.25	2.26	4.98	0.96	31.7	6.4	0.97	.267	2.93	67	2.89	70	6.47	171
23	Clayton Kershaw C. Kershaw	6	108	2.20	33	.766	182	181	1,411	19	9	0	1253.2	921	306	337	101	250	15	0	5	4,844	44	10.13	1.79	5.64	0.73	29.1	5.2	0.93	.267	2.42	58	2.54	64	6.61	193.1
24	Justin Verlander J. Verlander	6	112	2.52	41	.732	197	197	1,518	15	5	0	1329.0	946	372	407	149	282	36	0	3	5,174	27	10.28	1.91	5.38	1.01	29.3	5.5	0.92	.250	2.76	60	3.01	72	6.41	174.3
25	Pedro Martinez P. Martinez	6	112	2.28	37	.752	185	183	1,600	34	12	0	1321.2	937	335	378	100	290	59	1	13	5,180	26	10.90	1.97	5.52	0.68	30.9	5.6	0.93	.267	2.57	50	2.43	56	6.38	293.7