The Diamondbacks have removed Zach Duke from the starting rotation. Barry Enright will be called up from the minors to take his spot next Tuesday against the Brewers. Duke, 28, has an ugly 5.47 ERA over nine starts with the D-Backs this season. Not exactly what Kevin Towers was hoping for when he signed him this winter to a one-year, $4.25 million contract with an option for 2012.