There is a "very good chance" Adrian Peterson will be on the field for the Vikings in Week 1 of the season. "I don't know if we'll put him on the practice field anytime soon when we get to Mankato," Frazier told Judd Zulgad on ESPN Radio. "But everything indicates there's a very good chance he may be ready for that Jacksonville game (the season opener.) We're still far enough out that you really can't say that right now." Peterson is unlikely to practice to start camp -- which could briefly put him on the physically unable to perform -- but that's a procedural move true of a lot of rehabbing players.