Carlos Diaz has the best ERA by a Mets rookie, with an ERA of 2.05 in 1983.

Interpreted as:

mets rookie leading with a minimum of 0.5 IP per team game pitchers all-time

	NAME	ERA	SEASON	TM	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	Carlos Diaz C. Diaz	2.05	1983	NYM	54	3	1	.750	0	64	0	0	2	83.1	62	19	22	1	35	1	20	13	339	2	6.91	3.78	1.83	0.11	18.9	10.3	1.16	.256	2.38	57	2.66	73	6.70	9.1
2	Jerry Koosman J. Koosman	2.08	1968	NYM	35	19	12	.613	34	178	17	7	0	263.2	221	61	72	16	69	8	0	7	1,058	8	6.08	2.36	2.58	0.55	16.8	6.5	1.10	.260	2.46	70	2.70	96	7.54	3.7
3	Doug Sisk D. Sisk	2.24	1983	NYM	67	5	4	.556	0	33	0	0	11	104.1	88	26	38	1	59	4	39	7	447	5	2.85	5.09	0.56	0.09	7.4	13.2	1.41	.249	3.28	62	4.05	111	7.59	-5
4	Jon Matlack J. Matlack	2.32	1972	NYM	34	15	10	.600	32	169	8	4	0	244.0	215	63	79	14	71	2	1	14	1,003	7	6.23	2.62	2.38	0.52	16.8	7.1	1.17	.269	2.91	69	2.65	81	7.93	16.5
5	Dwight Gooden D. Gooden	2.60	1984	NYM	31	17	9	.654	31	276	7	3	0	218.0	161	63	72	7	73	2	0	2	879	3	11.39	3.01	3.78	0.29	31.4	8.3	1.07	.296	2.97	74	1.68	48	6.65	44.6
6	Jeff Reardon J. Reardon	2.61	1980	NYM	61	8	7	.533	0	101	0	0	6	110.1	96	32	36	10	47	0	35	15	475	2	8.24	3.83	2.15	0.82	21.3	9.9	1.30	.271	2.94	73	3.37	94	7.83	2.4
7	Max Kranick M. Kranick	2.66	2025	NYM	13	2	0	1.000	0	13	0	0	0	20.1	13	6	6	2	1	0	5	0	74	0	5.75	0.44	13.00	0.89	17.6	1.4	0.69	.190	2.66	67	3.20	81	5.75	1.7
8	Jacob deGrom J. deGrom	2.69	2014	NYM	22	9	6	.600	22	144	0	0	0	140.1	117	42	44	7	43	1	0	2	565	1	9.24	2.76	3.35	0.45	25.5	7.6	1.14	.297	2.82	77	2.66	72	7.50	16
9	Tom Seaver T. Seaver	2.76	1967	NYM	35	16	13	.552	34	170	18	2	0	251.0	224	77	85	19	78	5	1	6	1,029	5	6.10	2.80	2.18	0.68	16.5	7.6	1.20	.271	3.05	83	3.16	98	8.03	1.7
10	Jason Isringhausen J. Isringhausen	2.81	1995	NYM	14	9	2	.818	14	55	1	0	0	93.0	88	29	29	6	31	2	0	2	385	4	5.32	3.00	1.77	0.58	14.3	8.1	1.28	.282	2.81	69	3.82	91	8.52	3.7
11	Roger McDowell R. McDowell	2.83	1985	NYM	62	6	5	.545	2	70	0	0	17	127.1	108	40	43	9	37	1	36	8	516	6	4.95	2.62	1.89	0.64	13.6	7.2	1.14	.248	3.04	81	3.39	95	7.63	2.6
12	Ed Lynch E. Lynch	2.91	1981	NYM	17	4	5	.444	13	27	0	0	0	80.1	79	26	32	6	21	1	0	2	336	3	3.02	2.35	1.29	0.67	8.0	6.3	1.24	.260	3.59	85	3.72	109	8.85	-2.7
13	Kodai Senga K. Senga	2.98	2023	NYM	29	12	7	.632	29	202	0	0	0	166.1	126	55	60	17	77	5	0	0	694	14	10.93	4.17	2.62	0.92	29.1	11.1	1.22	.277	3.25	71	3.63	84	6.82	13
14	Nolan Ryan N. Ryan	3.09	1968	NYM	21	6	9	.400	18	133	3	0	0	134.0	93	46	50	12	75	4	1	4	559	7	8.93	5.04	1.77	0.81	23.8	13.4	1.25	.242	3.36	103	3.33	118	6.25	-7.6
15	Rick Aguilera R. Aguilera	3.24	1985	NYM	21	10	7	.588	19	74	2	0	0	122.1	118	44	49	8	37	2	1	2	507	5	5.44	2.72	2.00	0.59	14.6	7.3	1.27	.285	3.60	93	3.28	91	8.68	4.2
16	Noah Syndergaard N. Syndergaard	3.24	2015	NYM	24	9	7	.563	24	166	0	0	0	150.0	126	54	60	19	31	3	0	2	603	6	9.96	1.86	5.35	1.14	27.5	5.1	1.05	.279	3.60	87	3.24	84	7.56	10.6
17	Tug McGraw T. McGraw	3.32	1965	NYM	37	2	7	.222	9	57	2	0	1	97.2	88	36	47	8	48	3	17	2	416	7	5.25	4.42	1.19	0.74	13.7	11.5	1.39	.267	4.33	95	3.98	118	8.11	-6.6
18	Rick Baldwin R. Baldwin	3.33	1975	NYM	54	3	5	.375	0	54	0	0	6	97.1	97	36	39	4	34	4	29	4	418	5	4.99	3.14	1.59	0.37	12.9	8.1	1.35	.289	3.61	96	3.17	90	8.97	3.7
19	Harry Parker H. Parker	3.35	1973	NYM	38	8	4	.667	9	63	0	0	5	96.2	79	36	40	7	36	3	16	3	410	2	5.87	3.35	1.75	0.65	15.4	8.8	1.19	.239	3.72	94	3.41	95	7.36	1.6
20	Steven Matz S. Matz	3.40	2016	NYM	22	9	8	.529	22	129	0	0	0	132.1	129	50	53	14	31	5	0	2	547	3	8.77	2.11	4.16	0.95	23.6	5.7	1.21	.313	3.60	87	3.38	84	8.77	9.8
21	Larry Bearnarth L. Bearnarth	3.42	1963	NYM	58	3	8	.273	2	48	0	0	4	126.1	127	48	61	7	47	5	34	9	544	4	3.42	3.35	1.02	0.50	8.8	8.6	1.38	.275	4.35	100	3.67	108	9.05	-3.4
22	Zack Wheeler Z. Wheeler	3.42	2013	NYM	17	7	5	.583	17	84	0	0	0	100.0	90	38	42	10	46	4	0	2	431	6	7.56	4.14	1.83	0.90	19.5	10.7	1.36	.279	3.78	96	4.16	111	8.10	-4.5
23	Gary Gentry G. Gentry	3.43	1969	NYM	35	13	12	.520	35	154	6	3	0	233.2	192	89	94	24	81	5	0	5	962	9	5.93	3.12	1.90	0.92	16.0	8.4	1.17	.241	3.62	96	3.62	106	7.40	-5.7
24	David Peterson D. Peterson	3.44	2020	NYM	10	6	2	.750	9	40	0	0	0	49.2	36	19	20	5	24	3	0	0	205	1	7.25	4.35	1.67	0.91	19.5	11.7	1.21	.233	3.62	83	4.51	105	6.52	-1.2
25	Bob Apodaca B. Apodaca	3.50	1974	NYM	35	6	6	.500	8	54	1	0	3	103.0	92	40	47	7	42	2	15	9	434	3	4.72	3.67	1.29	0.61	12.4	9.7	1.30	.258	4.11	101	3.68	104	8.04	-1.8