On Buffalo's third snap, Wilson bolted through the line and crushed Edwards, who was able to get rid of the ball for a completion. Wilson's initial contact appeared clean. There was no helmet-to-helmet collision.
But Edwards suffered a concussion and was knocked out of the game. The Cardinals won 41-17.
The NFL said in an e-mail to ESPN.com that Wilson violated Rule 12, Section 2, Article 12 (2) of the NFL Official Playing Rules, which states "a defensive player must not unnecessarily or violently throw [a player] down and land on top of him with all or most of the defender's weight. Instead, the defensive player must strive to wrap up or cradle the passer with the defensive player's arms."
The NFL pointed out to Wilson in its official letter to him that he had been fined twice in 2007, once for a late hit and again for a horse collar tackle. The league notified Wilson that future infractions could lead to increased disciplinary action.