Wang not headed to AAA

Chien-Ming Wang was on his way to Pawtucket to pitch for Scranton tonight but was called back and will be in the bullpen as the long man for the Yankees tonight. I am guessing Alfredo Aceves not being able to go for at least a couple of days had a lot to do with that but I also wonder if its because the Phillies are in town this weekend and can hit anyone and the Yankees could use the extra pitcher?? I would like to hear any thoughts and opinions on this.