Atlanta optioned Tromp to Triple-A Gwinnett on Thursday.
Tromp was up with Atlanta for the club's last three games while Travis d'Arnaud (personal) was away from the team on paternity leave, but Tromp will head back to the minors now that d'Arnaud has been reinstated to the 28-man active roster. Atlanta didn't use Tromp during his abbreviated stay with the big club, as Sean Murphy started all three games at catcher.