The Diamondbacks needed to make room on the roster for Tuesday night's starting pitcher David Holmberg and that move is to designate outfielder Jason Kubel for assignment. With players are DFA'd there's a 10-day period where the player can either be traded (and it's August so Kubel would need to clear waivers or be traded to the claiming team) accept a minor-league assignment or be granted outright release and hit free agency. Kubel 31 is hitting .220/.288/.324 with five homers and 32 RBI this season in 89 games. He had 30 homers 30 doubles and 90 RBI last season but has tumbled down the depth chart behind Gerardo Parra Adam Eaton and A.J. Pollock as options at the corner outfield spots not to mention the availability of Martin Prado in the outfield.