How many unique players have played for the mets since 2018?

	NAME	G	AB	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	AVG	OBP	SLG	OPS	WRC	WRAA	WOBA	WRC+	BRAA
1	Tyler Bashlor T. Bashlor	46	1	0	0	0	0	0	0	0	0	1	0	0	1	0	0	0	0	0	0	.000	.000	.000	.000	0	-0.3	.000	-110	-0.3
2	Buddy Baumann B. Baumann	3	1	0	0	0	0	0	0	0	0	0	0	0	1	0	0	0	0	0	0	.000	.000	.000	.000	0	-0.3	.000	-110	-0.3
3	Gerson Bautista G. Bautista	5	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
4	Jose Bautista J. Bautista	83	245	37	50	13	0	9	37	51	5	84	2	2	302	90	22	0	1	2	2	.204	.351	.367	.718	37	1.7	.322	105	1.9
5	Chris Beck C. Beck	6	1	0	0	0	0	0	0	0	0	1	0	0	1	0	0	0	0	0	0	.000	.000	.000	.000	0	-0.3	.000	-110	-0.3
6	Jerry Blevins J. Blevins	60	2	0	1	0	0	0	1	0	0	1	0	0	2	1	0	0	0	0	0	.500	.500	.500	1.000	0	0.2	.440	184	0.2
7	Jay Bruce J. Bruce	94	319	31	71	18	1	9	37	41	0	75	2	3	361	118	28	0	1	4	3	.223	.310	.370	.680	37	-5.5	.296	88	-5.3
8	Asdrubal Cabrera A. Cabrera	98	375	48	104	23	1	18	58	29	1	81	0	0	407	183	42	0	2	1	12	.277	.329	.488	.817	59	11.1	.348	123	11.4
9	Yoenis Cespedes Y. Cespedes	46	172	23	42	7	0	11	33	15	2	65	3	0	191	82	18	0	2	2	2	.244	.309	.477	.786	25	2.3	.331	112	2.6
10	Michael Conforto M. Conforto	483	1,700	260	432	86	2	84	260	251	36	469	14	9	1,998	774	172	0	11	16	41	.254	.360	.455	.815	298	54.6	.349	123	58.2
11	Scott Copeland S. Copeland	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
12	Travis d'Arnaud T. d'Arnaud	14	38	3	5	0	0	1	5	3	0	10	0	0	41	8	1	0	0	0	1	.132	.195	.211	.406	0	-4.7	.185	14	-4.6
13	Jacob deGrom J. deGrom	76	165	9	36	4	0	2	17	8	0	53	0	0	177	46	6	4	0	0	1	.218	.254	.279	.533	9	-12.2	.235	46	-12
14	Matthew den Dekker M. den Dekker	8	18	0	0	0	0	0	1	2	0	9	0	0	21	0	0	0	1	0	0	.000	.095	.000	.095	-2	-4.3	.066	-66	-4.3
15	Phillip Evans P. Evans	15	21	1	3	0	0	0	1	2	0	8	1	0	23	3	0	0	0	0	1	.143	.217	.143	.360	0	-2.6	.175	7	-2.6
16	Jeurys Familia J. Familia	160	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
17	Chris Flexen C. Flexen	13	2	0	1	0	0	0	0	0	0	0	0	0	2	1	0	0	0	0	0	.500	.500	.500	1.000	0	0.2	.435	177	0.2
18	Wilmer Flores W. Flores	126	386	43	103	25	0	11	51	29	5	42	0	0	429	161	36	0	9	1	8	.267	.319	.417	.736	51	0.5	.316	102	0.8
19	Todd Frazier T. Frazier	262	904	122	210	39	2	41	131	89	21	234	10	6	1,022	376	82	0	8	2	20	.232	.313	.416	.729	121	-3.5	.313	99	-1.5
20	Drew Gagnon D. Gagnon	21	4	0	1	0	0	0	1	0	0	0	0	0	6	1	0	1	1	0	1	.250	.200	.250	.450	0	-0.6	.174	18	-0.6
21	Adrian Gonzalez A. Gonzalez	54	169	15	40	5	0	6	26	15	1	34	0	0	187	63	11	0	2	3	5	.237	.299	.373	.672	18	-4.1	.288	82	-4
22	Robert Gsellman R. Gsellman	130	8	1	0	0	0	0	0	2	1	6	0	0	11	0	0	0	0	0	0	.000	.273	.000	.273	0	-1.1	.191	19	-1.1
23	Luis Guillorme L. Guillorme	334	721	76	188	33	2	5	48	91	2	131	4	2	823	240	40	7	2	4	27	.261	.344	.333	.677	91	-7.2	.303	95	-4.9
24	Eric Hanhold E. Hanhold	3	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
25	Matt Harvey M. Harvey	8	7	0	2	0	0	0	0	0	0	2	0	0	7	2	0	0	0	0	1	.286	.286	.286	.571	0	-0.4	.251	58	-0.4