FWIW, here is the list of Black quarterbacks to start in a Super Bowl, and the outcomes:
Doug Williams – Won Super Bowl XXII
Steve McNair – Lost Super Bowl XXXIV
Donovan McNabb – Lost Super Bowl XXXIX
Colin Kaepernick – Lost Super Bowl XLVII
Russell Wilson – Won Super Bowl XLVII and Lost Super Bowl XLIX
Cam Newton – Lost Super Bowl 50
Patrick Mahomes – Won Super Bowl LIV, Lost Super Bowl LV