Basketball star LeBron James didn’t hesitate to talk about politics at last night’s ESPY Awards. James and other players used the annual ceremony to address the tension between police and protesters nationwide.

LeBron James: “I know tonight we honor Muhammad Ali, the GOAT, but to do his legacy any justice, let’s use this moment as a call to action for all professional athletes to educate ourselves, explore these issues, speak up, use our influence and renounce all violence.”

This comes as an increasing number of athletes and artists are speaking out against police brutality. On Saturday, members of the WNBA team the Minnesota Lynx wore warm-up jerseys printed with the names Philando Castile and Alton Sterling on the back, along with the words “Black Lives Matter” and an emblem of the Dallas Police Department. The three-time WNBA champions were playing the Dallas Wings. In response to the shirts, four off-duty Minneapolis police officers who were working security for the game walked off the job.