No and not necessarily ever. As crazy as it sounds I think it's more likely he becomes a closer then a starter this point.
In the time it takes demote Sanchez, stretch him out and call him back, Nolin will be ready and synched up with Hutch so that will take of the need for another is a replacement is needed for Hutch. As for Sanches, the situation with him and Stroman reminds me a lot of when Jansen and Marcum came up. They were both starter prospects who were assigned to the bullpen at the same but Janssen found success and Marcum gave up a lot of homers. JPR was going to move Jansen back to the roation and Gibby told him he was too valuable in the bullpen and to move Marcum instead. Marcum established himself as a starter and Janssen never left the bullpen. Given AA's reliever fetish, I think history is going to repeat itself here. It's fail as a reliever (in a small non-representative sample) and become a valuable starter instead of the other way around. Sanchez may very well be the 2015 closer. Heck, he might even be the 2014 closer by the end of the season depending on how things play out.