DeAndre Yedlin revealed his grandfather would fear for his life if he was still living in the USA as the Newcastle defender posted a powerful message on Twitter on Tuesday.
The USMNT international joined the chorus of stars across the sporting world speaking out after the death of George Floyd a week ago.
Unarmed black man Floyd was killed in Minneapolis last week after white police officer Derek Chauvin knelt on his neck for more than eight minutes.
The shocking incident has sparked days of civil unrest in America and led to protests across the world by demonstrators angry about the brutal and disparate treatment of black people by the police, racism in society and demanding change.