As NFL teams prepare to kickoff preseason games this week, one notable quarterback is without a team. Colin Kaepernick, the former 49ers quarterback who controversially took a knee during performances of the National Anthem, is without an NFL contract. On, more than 100,000 people have signed an online petition vowing not to buy NFL merchandise or watch games. Petitioners believe it's Kaepernick's stance on social issues that has caused him not to be signed by any teams.