Bosa, who turns 30 in July, is no longer the same destructive player he was when he last visited Orchard Park five years ago. Since that day, the Chargers have played 73 games counting the postseason, and Bosa played in only 47 because of a rash of injuries.

Allen and the Bills recently agreed to a six-year, $330M contract extension that included a record $250M in guaranteed money.