Peterson was about 20 minutes late to the stadium for the game against the Chicago Bears, then sidestepped questions after the game about the reason for it. Coach Leslie Frazier said it was "a big deal" that one of his team leaders was tardy but also declined to cite a reason for it.
"Anytime one of your leaders is not where he's supposed to be, it's not good," Frazier said Monday. "I talk to our team all the time about being where you're supposed to be and being on time. It's a big deal."
On Thursday, Peterson said he overslept and slept through the wake-up call at his hotel.
Peterson called the situation "unfortunate." He says he discussed it with Frazier, and he's moving forward to focus on this week's game against Green Bay.
On Monday, Frazier declined to reveal what he said during his discussion with Peterson.
"We have talked about it," Frazier said. "Hopefully it will never happen again -- I can't see why it would. I hope it never will again."
Frazier said Peterson has never had a problem with tardiness or missing the team bus. He also said that he was immediately aware of Peterson's absence.
"I knew when we left," Frazier said. "He's Adrian Peterson, so I know when he's on (the bus) or not on."
Peterson rushed for 108 yards -- his fifth consecutive 100-yard game -- in the 28-10 loss to the Bears (8-3), who moved two games ahead of the Vikings (6-5) in the NFC North standings.
Peterson leads the NFL with 1,236 yards this season.
Information from The Associated Press was used in this report.