The Orioles designated Romo for assignment Wednesday, Roch Kubatko of MASNSports.com reports.
The move frees a spot on the 40-man roster for Josh Walker, who was claimed off waivers. Romo was a waiver claim himself just last week, and he'll now go through the waivers process again. The switch-hitting catcher is 9-for-54 at the plate during his brief time in the majors.