lowest era for a pitcher in their first 5 seasons with at least 270 ip since 1920

Craig Kimbrel had the lowest ERA by a pitcher when pitching at least 270 innings in his first 5 seasons, with an ERA of 1.43.

	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	Craig Kimbrel C. Kimbrel	1.43	289.0	294	15	10	.600	0	476	0	0	186	153	46	51	12	108	8	241	4	1,127	22	14.82	3.36	4.41	0.37	42.2	9.6	0.90	.270	1.59	38	1.52	41	4.76	72.3
2	Emmanuel Clase E. Clase	1.67	312.2	318	16	22	.421	1	302	0	0	158	221	58	91	13	58	5	256	8	1,216	15	8.69	1.67	5.21	0.37	24.8	4.8	0.89	.248	2.62	40	2.39	57	6.36	61.3
3	Jonathan Papelbon J. Papelbon	1.84	298.0	268	14	11	.560	3	346	0	0	151	215	61	70	21	77	12	227	5	1,187	5	10.45	2.33	4.49	0.63	29.1	6.5	0.98	.265	2.11	40	2.62	61	6.49	56.8
4	Paul Skenes P. Skenes	1.96	320.2	55	21	13	.618	55	386	1	0	0	230	70	76	21	74	12	0	0	1,247	4	10.83	2.08	5.22	0.59	31.0	5.9	0.95	.277	2.13	46	2.39	58	6.46	61
5	Frank Linzy F. Linzy	2.15	389.2	230	32	29	.525	1	180	0	0	65	348	93	119	11	128	7	169	38	1,615	14	4.16	2.96	1.41	0.25	11.1	7.9	1.22	.261	2.75	64	2.98	93	8.04	10.8
6	Greg Holland G. Holland	2.19	275.0	261	15	10	.600	0	381	0	0	113	195	67	74	14	99	1	182	11	1,104	23	12.47	3.24	3.85	0.46	34.5	9.0	1.07	.297	2.42	54	2.05	52	6.38	58.6
7	Takashi Saito T. Saito	2.19	299.1	292	17	13	.567	0	366	0	0	84	212	73	79	19	94	12	182	10	1,195	6	11.00	2.83	3.89	0.57	30.6	7.9	1.02	.274	2.38	51	2.58	60	6.37	58.2
8	Kenley Jansen K. Jansen	2.25	287.2	284	14	10	.583	0	448	0	0	106	178	72	73	20	100	9	163	5	1,139	8	14.02	3.13	4.48	0.63	39.3	8.8	0.97	.281	2.28	62	2.00	53	5.57	57.3
9	Josh Hader J. Hader	2.26	282.1	232	16	13	.552	0	482	0	0	96	135	71	74	34	106	14	121	3	1,085	5	15.36	3.38	4.55	1.08	44.4	9.8	0.85	.225	2.36	53	2.60	60	4.30	52.6
10	Francisco Rodriguez F. Rodriguez	2.28	316.0	268	16	12	.571	0	420	0	0	106	201	80	87	27	130	5	172	15	1,265	30	11.96	3.70	3.23	0.77	33.2	10.3	1.05	.255	2.48	52	2.78	64	5.72	57.1
11	Tom Seaver T. Seaver	2.34	1379.1	180	95	54	.638	175	1,155	90	18	1	1,090	359	397	97	352	28	5	30	5,482	32	7.54	2.30	3.28	0.63	21.1	6.4	1.05	.258	2.59	68	2.57	78	7.11	114.9
12	Rob Dibble R. Dibble	2.35	409.0	309	25	19	.568	0	570	0	0	69	282	107	115	17	150	7	159	23	1,640	24	12.54	3.30	3.80	0.37	34.8	9.1	1.06	.296	2.53	64	1.69	45	6.21	92.7
13	Gregg Olson G. Olson	2.36	305.1	270	17	19	.472	0	303	0	0	131	244	80	83	9	140	5	232	19	1,275	26	8.93	4.13	2.16	0.27	23.8	11.0	1.26	.287	2.45	60	2.62	67	7.19	44.3
14	John Franco J. Franco	2.37	447.1	333	38	22	.633	0	307	0	0	116	383	118	139	24	174	5	236	33	1,851	12	6.18	3.50	1.76	0.48	16.6	9.4	1.25	.268	2.80	62	3.29	87	7.71	25.6
15	Bruce Sutter B. Sutter	2.39	493.0	300	32	30	.516	0	494	0	0	133	371	131	156	27	149	3	222	35	1,983	28	9.02	2.72	3.32	0.49	24.9	7.5	1.05	.263	2.85	60	2.31	60	6.77	82.2
16	Joakim Soria J. Soria	2.40	315.1	298	13	15	.464	0	341	0	0	160	242	84	89	24	87	13	239	6	1,278	10	9.73	2.48	3.92	0.68	26.7	6.8	1.04	.268	2.54	55	2.89	69	6.91	47.4
17	Koji Uehara K. Uehara	2.42	286.0	230	9	10	.474	12	332	0	0	35	199	77	82	32	38	1	97	4	1,091	3	10.45	1.20	8.74	1.01	30.4	3.5	0.83	.243	2.58	56	2.60	61	6.26	51.3
18	Jeff Reardon J. Reardon	2.44	402.1	263	26	22	.542	0	324	0	0	63	330	109	122	30	157	5	184	35	1,682	9	7.25	3.51	2.06	0.67	19.3	9.3	1.21	.257	2.73	69	3.27	91	7.38	13.7
19	Brad Ziegler B. Ziegler	2.44	320.2	323	17	14	.548	0	211	0	0	19	290	87	101	10	118	7	87	21	1,301	2	5.92	3.31	1.79	0.28	16.2	9.1	1.27	.293	2.83	59	3.34	81	8.14	27.5
20	Joe Berry J. Berry	2.45	294.0	133	21	22	.488	0	117	0	0	18	246	80	99	14	87	3	105		1,215	2	3.58	2.66	1.34	0.43	9.6	7.2	1.13	.233	3.03	72	3.25	94	7.53	6.2
21	Bryan Harvey B. Harvey	2.45	279.0	225	16	16	.500	0	331	0	0	113	197	76	87	20	115	2	192	16	1,146	21	10.68	3.71	2.88	0.65	28.9	10.0	1.12	.261	2.81	63	2.61	66	6.35	42.6
22	Tony Watson T. Watson	2.46	318.2	333	24	8	.750	0	287	0	0	5	241	87	91	24	87	18	37	7	1,267	4	8.11	2.46	3.30	0.68	22.7	6.9	1.03	.255	2.57	67	3.25	88	6.81	16.1
23	Jesse Orosco J. Orosco	2.46	358.2	202	28	26	.519	4	298	0	0	53	272	98	117	23	140	7	126	17	1,461	5	7.48	3.51	2.13	0.58	20.4	9.6	1.15	.251	2.94	69	3.13	87	6.83	18.1
24	Dan Quisenberry D. Quisenberry	2.47	506.1	288	30	23	.566	0	164	0	0	136	474	139	157	29	72	2	254	32	2,010	3	2.92	1.28	2.28	0.52	8.2	3.6	1.08	.255	2.79	61	3.25	83	8.43	38.7
25	Tim Burke T. Burke	2.48	479.1	330	37	19	.661	2	323	0	0	76	405	132	147	32	154	14	177	53	1,971	17	6.06	2.89	2.10	0.60	16.4	7.8	1.17	.258	2.76	69	3.33	91	7.60	19.7