Should Wieters not be ready by Opening Day, the O's would be able to backdate his disabled list stint to March 25, which is why he'll switch to playing in Minor League games.
Orioles relievers Chaz Roe and Brian Matusz were not in camp on Thursday. Matusz, who has been dealing with a lower back injury, was sick with the stomach flu while Roe joined his wife for the birth of their second child.
Showalter wasn't sure when Roe would return to the team, but the bullpen hopeful will probably get "another three outings at least" before camp ends.