On Tuesday, the coach said Peterson is "right on course" in his recovery, but added the team will defer to doctors and trainers for any timetable. Frazier -- on a USO tour in the Persian Gulf this week -- expects Peterson will want to be on the field when training camp kicks off July 27, but that doesn't mean he'll get the green light.
Rapoport: Peterson battling back
A devastating knee injury is putting Adrian Peterson's famous workout habits to the ultimate test, Ian Rapoport says. **More ...**
"He's so valuable to our organization that we have to be smart," Frazier told USA Today. "We'll tread lightly as far as Week 1 and how much he'll contribute on the field. Even when we get to training camp, he's going to be chomping at the bit, but we'll have to be smart."
Don't forget, Minnesota signed Peterson to a massive seven-year, $96 million deal three months before he blew out his knee. Every NFL player represents an investment on some level, but the Vikings practically have a partnership with Peterson.