Missing the first three weeks of training camp is usually a bad thing when it comes to a new player’s chances of making the 53-man roster, but not being able to practice might be the best thing that ever happened to Letroy Guion. By being on the non-football injury list instead of the field, the former Viking has yet to be exposed as a below-average defensive lineman. And since GM Ted Thompson signed him as an unrestricted free agent in April, he obviously thinks Guion can help the Packers. Even better for the 27-year-old is that the coaches can’t argue with that opinion since they haven’t seen him play. So all he has to do is stay on the NFI list for another week or so, get healthy in time for the last preseason game and then make a few plays against a bunch of offensive linemen who’ll be trying out for the Arena Football League right after Labor Day. Whoever said a hamstring injury is a bad thing?