Peterson said he raced to South Dakota and saw Tyrese a day before he died.
Man gets life in prison in death of Adrian Peterson's son →
"I hate for him to go down like that, my guy go down," said Peterson, whose Vikings host the Chiefs on Sunday. "He's been through it before with his left knee and now he knows what to expect doing his rehab. That's one positive."
Vikings' Peterson, Chiefs' Charles relate on ACL injuries →