Clarke was placed on the 15-day injured list Friday with right elbow inflammation.
Clarke escaped trouble to pitch a scoreless inning Wednesday against the Mets, although he did allow a hit while walking two batters. He has a 5.23 ERA, 1.35 WHIP and 10 strikeouts over his last 10 appearances. James McArthur was recalled from Triple-A Omaha in a corresponding move.