Berore he coached the Raiders where did Jack Del Rio play football?
2016 Oakland Raiders season:  The Raiders improved on a 7–9 campaign in 2015 and finished with a winning record for the first time since 2002, finishing the regular season with a 12–4 record. Jack Del Rio:  A linebacker for four NFL teams between 1985–1996, he played both football and baseball for the University of Southern California Trojans.
i don't know