Cobb will not make his debut until April 14 against the Red Sox, Roch Kubatko of MASN Sports reports.
Cobb, who signed with the Orioles on March 20, continues to build up his arm strength as he readies for his season debut. He recently completed a three-inning simulated game, but Baltimore wants him to pitch five or six innings in a minor-league game before joining the big club, so his first start for his new team will now come a week later than initially anticipated.