Former San Francisco 49ers safety Eric Reid joined Colin Kaepernick's #TakeAKnee national anthem protest against police brutality, and he's also joining the movement's leader in taking legal action against the league's owners.

Last year, Kaepernick — who is still a free agent — filed a collusion grievance against NFL owners that claimed the owners "have colluded to deprive Mr. Kaepernick of employment rights in retaliation for Mr. Kaepernick's leadership and advocacy for equality and social justice and his bringing awareness to peculiar institutions still undermining racial equality in the United States."

According to the Houston Chronicle, Reid has filed a collusion grievance against the NFL, as he has not been able to join a team despite being dubbed one of the top safeties of the league.  

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Reid touched on his unemployment status on Twitter in March.

"The notion that I can be a great signing for your team for cheap, not because of my skill set but because I’ve protested systemic oppression, is ludicrous," Reid tweeted. "If you think is, then your mindset is part of the problem too."

“Our union is aware that Eric Reid and his legal representatives filed a collusion claim, which will be heard through the arbitration process as spelled out in our collective bargaining agreement," stated the NFL Players Association. "Our union supports Eric and we are considering other legal options to pursue.”

Reid recently visited the Cincinnati Bengals but did not sign a contract with the team.