You can pick anyone and you get them in their prime for just the remainder of this season. I feel like Boselli is the obvious answer. Although, imagine having Big John Henderson in the middle of that D-Line to start getting some more pressure up the middle.
Defense seems obvious, but I want greatness. I am going to cheat on the question and go for two players; Boselli and Searcy. Just imagine the time Trevor would have and how clean the jersey would be.