The Giants optioned Tromp to their minor-league camp Monday.
Tromp and fellow catcher Joey Bart were both part of Monday's roster cuts, as the Giants appear set to go with Buster Posey and Curt Casali as their two backstops for Opening Day. If Bart and Tromp are both assigned to Triple-A Sacramento, Tromp would likely serve as the No. 2 option behind Bart, who is being groomed as Posey's long-term replacement.