More professional athletes have joined the growing movement against police violence. During warm-ups Sunday, Cleveland Browns football player Andrew Hawkins wore a shirt which read “Justice for Tamir Rice and John Crawford.” Both Crawford and 12-year-old Tamir Rice were killed by police in Ohio while holding toy guns. Cleveland’s police union demanded an apology, calling Hawkins’ protest “pathetic” and saying he should “stick to playing football.” But the Cleveland Browns team has refused to apologize. Hawkins defended his actions Monday, saying he was thinking of his two-year-old son.

Andrew Hawkins: “The number one reason for me wearing the T-shirt was the thought of what happened to Tamir Rice happening to my little Austin scares the living hell out of me. And my heart was broken for the parents of Tamir and John Crawford, knowing they had to live that nightmare of a reality.”