This may come to you as a surprise, but typically, if a head coach is ever going to win a Super Bowl, he is going to do so roughly within his first five seasons of serving as a head coach. There are some notable exceptions, with Bill Belichick and his tenure as head coach of the Cleveland Browns being chief among them, but most head coaches who have gone on to win one or more Super Bowls managed to get there within there and win within their first five years, give or take.
Even the Pittsburgh Steelers’ Chuck Noll, he took over a bottom-feeder in 1969 and won a Super Bowl by 1974, six seasons later.