Colin Kaepernick's grievance against the NFL will go to trial as an arbitrator denied the league's request to throw out the case.

Kaepernick argues that owners have colluded to keep him off any NFL roster since he hit free agency in 2017.

Kaepernick began protesting police violence and racial inequality during the 2016 preseason.

Kaepernick contends the owners violated union rules by conspiring to keep him off teams.