Ronny Mauricio, Mark Vientos among four added to Mets' 40-man roster ahead of Rule 5 deadlineRHP Dedniel Núñez was returned to Mets from Giants11/20/2021, 1:28 AMAlex SmithEditorial ProducerMets prospect Ronny Mauricio at MCU Park on May 25, 2021. / Rob Carbuccia/SNY