The writing has been on the wall for a few weeks that Suter only had a few more starts to prove his case. I'm assuming the plan was now that Guerra has locked down that 4th spot for now, Suter gets his chance until Miley is ready. If they want to go with Miley at that point, cool, otherwise Woodruff should really be in there and either way move Suter to the bullpen. If they go with Miley, my guess is he's on a start-to-start basis and if he screws up too badly, they cut him and go with Woodruff.