But Peterson's health was not an issue. There was no mystery ailment. There was no conspiracy surrounding the team's injury report. There was actually a very simple explanation: Peterson was tardy and missed the bus.
Instead, Peterson was forced to take a cab to Soldier Field, where he then met up with his team.
It's humorous to think of the amazing, NFL star Adrian Peterson making a mistake usually reserved for 10-year old school children, but, writes Mark Craig of the Minnesota Star Tribune, head coach Leslie Frazier did not find the situation funny.
"There's something Adrian and I have to talk about regarding getting to the stadium," said Vikings coach Leslie Frazier, who clearly was not amused.
Peterson did not think his missing the bus was a big deal, saying the focus should instead be on the Vikings' loss.
"Me and Coach actually haven't had the opportunity to talk about it. It really wasn't a big deal. Came out and played. What's important is what can we do to come back and get back on track. That's going to be our main focus."
The cab-faring Peterson and the Vikings dropped to 6-5 with the loss and stand on the outside looking in at the NFC playoff picture.