Mariano Rivera played the most seasons with an ERA of 3.25 or better, with 18 seasons.

Interpreted as:

most seasons by a player of 3.25 era or less

	NAME	SEAS	ERA	G	W	L	W%	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	Mariano Rivera M. Rivera	18	2.03	1,096	77	57	.575	0	1,122	0	0	652	1216.2	927	274	297	60	256	44	950	41	4,802	13	8.30	1.89	4.38	0.44	23.4	5.3	0.97	.261	2.20	45	2.63	59	6.86	250.6
2	Walter Johnson W. Johnson	17	1.89	674	363	231	.611	552	3,063	459	103	29	5021.0	4,013	1,054	1,478	61	1,099	171	115		19,629	142	5.49	1.97	2.79	0.11	15.6	5.6	1.02	.259	2.65	63	2.22	73	7.19	434.7
3	Whitey Ford W. Ford	16	2.75	498	236	106	.690	438	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	75	3.26	88	7.85	156.9
4	Red Ames R. Ames	16	2.56	507	180	160	.529	363	1,679	207	27	34	3112.0	2,782	885	1,257	40	1,006	63	107		12,695	152	4.86	2.91	1.67	0.12	13.2	7.9	1.22	.277	3.64	91	2.52	88	8.05	122.9
5	Cy Young C. Young	16	2.31	673	379	234	.618	610	2,290	564	65	15	5545.1	5,126	1,425	2,144	80	826	116	57		21,907	105	3.72	1.34	2.77	0.13	10.5	3.8	1.07	.271	3.48	72	2.48	77	8.32	461
6	Billy Wagner B. Wagner	15	2.19	825	45	36	.556	0	1,168	0	0	416	875.1	573	213	243	76	282	32	684	26	3,471	36	12.01	2.90	4.14	0.78	33.7	8.1	0.98	.260	2.50	52	2.62	61	5.89	162.7
7	John Franco J. Franco	15	2.48	820	73	62	.541	0	729	0	0	370	974.2	884	269	324	51	369	11	640	56	4,096	39	6.73	3.41	1.98	0.47	17.8	9.0	1.29	.284	2.99	64	3.23	83	8.16	74.1
8	Tom Seaver T. Seaver	15	2.59	513	265	146	.645	505	3,108	209	54	1	3859.2	3,098	1,111	1,230	280	1,084	59	5	99	15,477	100	7.25	2.53	2.87	0.65	20.1	7.0	1.08	.257	2.87	73	2.79	80	7.22	309.3
9	Hoyt Wilhelm H. Wilhelm	15	2.18	795	116	94	.552	41	1,255	17	4	187	1749.0	1,284	424	528	104	577	52	495	38	6,998	64	6.46	2.97	2.18	0.54	17.9	8.2	1.06	.236	2.72	60	2.93	79	6.61	145.7
10	Warren Spahn W. Spahn	15	2.86	557	297	180	.623	508	2,030	319	54	20	4086.1	3,651	1,299	1,459	317	1,099	30	40	41	16,664	64	4.47	2.42	1.85	0.70	12.2	6.6	1.16	.253	3.21	78	3.34	91	8.04	157
11	Eddie Plank E. Plank	15	2.21	554	289	166	.635	465	2,049	351	67	23	3935.0	3,385	968	1,293	34	943	165	73		15,474	71	4.69	2.16	2.17	0.08	13.2	6.1	1.10	.273	2.96	80	2.36	87	7.74	159
12	Christy Mathewson C. Mathewson	15	2.05	603	365	171	.681	527	2,435	423	78	30	4569.0	3,983	1,042	1,491	79	808	54	68		17,988	113	4.80	1.59	3.01	0.16	13.5	4.5	1.05	.267	2.94	72	2.23	75	7.85	368.8
13	Clayton Kershaw C. Kershaw	14	2.35	381	195	79	.712	379	2,700	25	15	0	2483.1	1,843	648	714	199	596	38	1	24	9,725	87	9.79	2.16	4.53	0.72	27.8	6.1	0.98	.266	2.59	61	2.75	68	6.68	345.1
14	Steve Carlton S. Carlton	14	2.73	441	224	127	.638	425	2,716	174	39	1	3232.0	2,767	982	1,116	214	1,011	31	7	75	13,168	107	7.56	2.82	2.69	0.60	20.6	7.7	1.17	.278	3.11	77	2.74	78	7.71	280.9
15	Grover Alexander G. Alexander	14	2.27	535	302	151	.667	456	1,912	350	84	28	4059.0	3,578	1,023	1,329	102	789	60	70		16,189	27	4.24	1.75	2.42	0.23	11.8	4.9	1.08	.261	2.95	69	2.64	79	7.93	300.7
16	Francisco Rodriguez F. Rodriguez	13	2.50	772	45	35	.563	0	974	0	0	392	810.2	591	225	242	74	309	15	578	34	3,293	59	10.81	3.43	3.15	0.82	29.6	9.4	1.11	.269	2.69	60	3.07	74	6.56	102.2
17	Trevor Hoffman T. Hoffman	13	2.41	753	42	48	.467	0	863	0	0	482	793.0	583	212	235	54	205	7	646	35	3,146	38	9.79	2.33	4.21	0.61	27.4	6.5	0.99	.262	2.67	60	2.62	61	6.62	147.9
18	John Smoltz J. Smoltz	13	2.95	499	140	83	.628	288	2,067	35	12	144	2200.2	1,891	722	796	163	579	27	184	52	8,923	84	8.45	2.37	3.57	0.67	23.2	6.5	1.12	.284	3.26	72	2.95	71	7.73	301.7
19	Roger Clemens R. Clemens	13	2.57	412	224	101	.689	412	2,909	99	39	0	3007.2	2,380	858	969	178	883	84	0	46	12,111	68	8.70	2.64	3.29	0.53	24.0	7.3	1.08	.273	2.90	59	2.71	65	7.12	500.3
20	Jesse Orosco J. Orosco	13	2.49	732	66	54	.550	2	753	0	0	120	844.1	643	234	267	65	343	17	336	40	3,475	23	8.03	3.66	2.20	0.69	21.7	9.9	1.17	.252	2.85	66	3.30	87	6.85	45.1
21	Rich Gossage R. Gossage	13	2.18	666	84	61	.579	0	1,023	0	0	269	1122.2	817	272	311	61	422	17	530	66	4,518	26	8.20	3.38	2.42	0.49	22.6	9.3	1.10	.252	2.49	58	2.75	72	6.55	137
22	Bert Blyleven B. Blyleven	13	2.84	439	200	158	.559	435	2,524	194	54	0	3326.1	2,935	1,051	1,182	230	852	92	2	43	13,528	67	6.83	2.31	2.96	0.62	18.7	6.3	1.14	.275	3.20	76	2.83	75	7.94	343.8
23	Gaylord Perry G. Perry	13	2.74	492	233	167	.583	461	2,484	236	39	7	3694.0	3,187	1,126	1,300	236	904	70	16	114	14,912	91	6.05	2.20	2.75	0.57	16.7	6.1	1.11	.263	3.17	78	2.82	82	7.76	260.4
24	Tommy John T. John	13	2.77	354	153	90	.630	327	1,214	85	27	2	2255.0	2,073	694	811	128	579	46	12	36	9,197	76	4.85	2.31	2.10	0.51	13.2	6.3	1.18	.269	3.24	80	3.07	87	8.27	120.3
25	Lefty Grove L. Grove	13	2.75	506	268	108	.713	385	1,991	269	34	53	3347.0	3,179	1,023	1,233	118	932	33	104		13,958	37	5.35	2.51	2.14	0.32	14.3	6.7	1.23	.281	3.32	61	3.20	72	8.55	454.9