Tampa Bay Buccaneers head coach Bruce Arians and NFLPA executive director DeMaurice Smith continued a back-and-forth over the practical power of protest on Friday.
Arians was quoted on Thursday as saying "protesting doesn't do crap, in my opinion" as teams around professional sports, including the NFL, began postponing games and canceling practices in the wake of the police shooting of Jacob Blake in Kenosha, Wisconsin.
The coach instead appealed to his team to take action.
Smith retweeted a story about Arians' quote in which he included a photo of the late congressman John Lewis.