Kaepernick files grievance against NFL, alleging collusion

NEW YORK — Former San Francisco 49ers quarterback Colin Kaepernick filed a grievance against the NFL on Sunday, alleging that he remains unsigned as a result of collusion by owners following his protests during the national anthem.Kaepernick started a national conversation about political activism by athletes last season when he decided to sit, and then kneel, during the anthem to bring attention to mistreatment of African-Americans by police. Other players have continued the protests this