Before Colin Kaepernick protested national anthem, NBA star Mahmoud Abdul- Rauf did same in his own way - ESPN
Kaepernick's stand far from the first sports protest
Kaepernick's predecessor: Mahmoud Abdul-Rauf opens up about national anthem controversy in new film
Niners QB Kaepernick refuses to stand for anthem in protest
I think if he believes that, we have to honor that” - When Michael Jordan addressed Abdul-Rauf's national anthem protest in 1996, Basketball Network
He Was the NBA's Kaepernick: 'Stand' Shows Why Mahmoud Abdul-Rauf Matters » LIVING LIFE FEARLESS
What the NFL Players' Union Chief Has to Say About Colin Kaepernick's Protest
By Taking a Knee, Is Colin Kaepernick Actually Standing Up For First Amendment Rights?
What's taking the knee and why is it important? - BBC News