That may have been recently updated. AZPhil posted that INF Aramis Ademan, INF Jhonny Bethencourt, RHP Hector Garcia, OF Jose Gonzalez, RHP Jose Leidenz, 3B Rafael Mejia, SS Rafael Narea, LHP Pablo Ochoa, LHP Eugenio Palma, SS-2B Yeiler Peguero, SSF Yonathan Perlaza, OF Ruben Reyes, OF Abraham Rodriguez, RHP Andri Rondon, and OF Jonathan Sierra have been called up to participate in ExST. It was originally reported that there'd be a total of 18 so there may be 3 more to come.