The Facts: CBSSports.com insider Jason La Canfora has heard "plenty of rumblings" about Luck starting the year on the physically unable to perform list.

Diehards Line:And with that report, it's safe to say the uncertainty surrounding Luck and his surgically-repaired throwing shoulder ratchets up a notch or two. And it was already pretty high after Luck himself wouldn't commit to being ready for Week 1 as camp opened. Remember, Luck is already on the preseason PUP, which he can come off of at any time. If, however, he's placed on the regular-season PUP list, Luck would have to miss at least six games. As La Canfora contends, with Scott Tolzien, Stephen Morris and Philip Walker as the QBs behind him on the depth chart, Luck is the franchise. La Canfora went on note that no one knows precisely when Luck might be cleared to return to practice, or subsequently how long it might take him to be fully cleared for contact. Without him, the Colts don't look the same and fantasy owners hoping to maximize the potential players like T.Y. Hilton, Donte Moncrief and Jack Doyle might not get their wish. ... Stay tuned.