It doesn't matter, the play is dead. He made contact with a player after the play was dead, that is a penalty. It's no different than if a runner who is pushing a pile, whistle blows the play dead for forward progress and a defensive player comes in after that still trying to stop him. The play is dead, player gets penalty.
If Carp is a QB, that's a penalty.
EDIT: And what does Carp kicking a ball have to do with hitting another player? Carp didn't hit Sherman, he didn't try to tackle a Seahawks defender. The logic does not go both ways.