Myles Jack knee a ticking time bomb?

http://www.rotoworld.com/headlines/nfl/334209/report--myles-jack?rw=1 The Philadelphia Daily News' Les Bowen was told by an NFL source UCLA LB Myles Jack's knee is "a time bomb."Jack's medical recheck did not go well, with CBS Sports' Dane Brugler reporting several teams had "long-term question marks." This is lying season, however, and it is possible teams are leaking bad information about Jack's knee in order to push him down the draft board. A top-five talent, it is anyone's guess where Jack ends up, but it would still be a shock if he slipped out of the top 15.