Adrian Petersonwas just fine on Saturday at Vikings camp. (Genevieve Ross /AP)

Peterson, who is on the physically-unable-to-perform list as he recovers from left knee reconstruction last December, ate seafood during lunch at a Mankato, Minn., restaurant. When he returned to camp, things got scary. His face and throat began to swell and he experienced shortness of breath. He was taken to a hospital in an ambulance.

“Everything is back to normal now,” Frazier said Monday evening (via “Little bit of a scare, but he's fine.”

Peterson, who earlier this month was arrested in an incident in Houston, was back in his dorm within hours and was cleared to continue his rehab work today. Frazier said that Peterson has had allergic reactions in the past, but never this severe.

Frazier said Peterson told him that he has had allergic reactions before, but not as severe as Monday's.

In the future, A.P. might want to stick with beef and chicken.

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