If you take the list of 30 pre-draft visitors and cut it down to the names that could go in the top half of the first round, you're left with these players:
How many prospects does that leave? 8. What pick do we have in the draft? 8. Now this could be a coincidence, but it might not be considering Nix's preference for drafting his pre-draft visitors. It's extremely possible that we were just handed the top of Buffalo's Big Board and the Bills have narrowed down their choices to these 8 players, given that at least one of them will be available when they pick.