Barry Tompkins: Wake me up when the preseason is over

Are you ready for some football?

Well, ready or not — it’s here.

The San Francisco 49ers threw open the doors to their practice facility this week and in walked about 93 physical specimens each of whom is intent on claiming one of the 53 available jobs come September when things get serious.

If your name is Purdy, McCaffrey, Williams, Kittle, Bosa, Warner or Lenoir, you needn’t look over your shoulder. Nobody’s coming to get those guys. If, however, you’re gifted a helmet...