The NFL draft is the highlight of the offseason—both because it has a massive impact on the future of the league, and because it's an ever-changing entity. While the crop of draft-eligible prospects doesn't really change between the end of the collegiate season and the draft, the view of which players are at the top will.
Between all-star events like the Senior Bowl and the East-West Shrine Game, the scouting combine and pro days, there are plenty of opportunities for players to have their stocks rise or fall after their college careers have ended.
Sometimes, bits of news can impact the draft picture just as dramatically.