Why aren't football teams signing Colin Kaepernick?

The NFL season kicks off tonight. No teams have signed Colin Kaepernick, the former San Francisco quarterback who kneeled during the national anthem. Seattle Seahawks star Michael Bennett recently had a run-in with Las Vegas police who took him down and cuffed him. And in baseball, the Red Sox stole signs, and the Dodgers have lost 11 of their last 12 games.