I honestly hadn't thought anything about it until you mentioned it here, but I can understand why he wasn't brought up (whether that be by design or if he just declined to show up), but it would have looked kind of silly I think to have Albert Pujols there as the face of the game and of the All-Star festivities while again having to answer questions about performance enhancing drugs and proclaiming that he's clean... and then having one of the key figures from the Steroid Era there in attendance as well.