The Marlins released
Castillo on Tuesday.
Castillo signed with Miami earlier this month after the team placed backstops Jorge Alfaro
(COVID-19) and Chad Wallach
(undisclosed) on the injured list, but both have since resumed working out at the organization's alternate training site in Jupiter. With both players nearing returns and Francisco Cervelli
and Ryan Lavarnway
still ahead of him in the pecking order at catcher, Castillo was deemed expendable.