Amaro said he didn't know when Happ would begin his rehab assignment.
And despite some tense moments in the final inning of Friday's 5-1 win over Boston, Dubee was happy with J.C. Romero's progress in his work coming back from offseason elbow surgery.
"He's starting to get into a nice comfort zone," Dubee said. "He's doing fine. He's getting in shape."