Is he the first black manager in the Premier League? Delighted for him.
Here is a list that I found of black/mixed-race Premier League mangers:
Ruud Gullit
Chelsea, Newcastle United
Chris Hughton
Tottenham (caretaker), Newcastle United, Norwich City, Brighton
Jean Tigana
Fulham
Paul Ince
Blackburn Rovers
Ryan Giggs
Manchester United (caretaker)
Darren Moore
West Brom
Terry Connor
Wolves (caretaker)
Nuno Espirito Santo
Wolves (looking like Spurs)
Hayden Mullins
Watford (caretaker) only managed them for two games
Chris Ramsey
QPR