Just listened to this podcast. One of the guys said he has a source saying Luck has a bruise with a possible stress fracture. With tape and shooting it up he should be good to go. Now I have no clue if this is a legitimate source. Just passing it along. It did look like his ankle was taped and padded like this guy said. It would make since with the calf injury that it could of caused that. Especially if he has a bothersome ankle.
At the very least, he could be a solid PS stash. He may not have the top end speed of Hines, but he's elusive and has pretty quick acceleration after cuts and contact. He may not be a "home run hitter", but sometimes that's not the end all be all. My biggest concern is that I don't think a lot of the arm tackles he broke in college will be what he sees in the NFL. I'm excited to see him suit up though!