Apparently white guys can't cover NFL wide receivers, or so the league's population of cornerbacks suggests.
I can't remember the last time I saw the pix of the starting defense for ANY NFL team that had as many as five white guys on it.
Some folks just specialize, y'know?
The early 80s Raiders had Howie Long, John Matuzak, Lyle Alzado, Matt Millen, Ted Hendricks, and Van McElroy.
....so yeah, it's been a while.