Longtime NFL assistant coach Alex Gibbs, famous for Broncos' Super Bowl prowess in the 1990s, dies at 80 | CBS Sports Headlines Longtime NFL assistant coach Alex Gibbs, famous for Broncos' Super Bowl prowess in the 1990s, dies at 80 Gibbs is widely credited with ushering in the zone-blocking scheme … Continue reading Longtime NFL assistant coach Alex Gibbs, famous for Broncos' Super Bowl prowess in the 1990s, dies at 80