The Dodgers signed Tromp to a minor-league deal Thursday, and he's been sent to Triple-A Oklahoma City, Alex Freedman of the Oklahoma City Comets reports.
Tromp elected free agency Aug. 4 after getting booted off Baltimore's 40-man roster July 31. The Dodgers have dealt with depth issues at catcher, as Will Smith (neck) and Dalton Rushing (elbow) have missed extended time. In a corresponding move Thursday, the Dodgers released Chuckie Robinson.