PHILADELPHIA -- An arbitrator is sending Colin Kaepernick's grievance with the NFL to trial, denying the league's request to throw out the quarterback's claims that owners conspired to keep him out of the league because of his protests of social injustice. Kaepernick's lawyer Mark Geragos tweeted a picture Thursday of a ruling by arbitrator Stephen B. Burbank. The NFL declined a request for comment. Kaepernick, who led the San Francisco 49ers to a Super Bowl appearance and NFC Championship Game in consecutive seasons, argues that owners have colluded to keep him off any NFL roster since he hit free agency in 2017. Burbank's decision means there was sufficient evidence of collusion to keep Kaepernick's drive going. Now some owners, coaches and team executives will be called to testify during the season, a situation the league hoped to avoid. Kaepernick began a wave of protests by NFL players two seasons ago, kneeling during the national anthem to protest police...