Greg Knapp was an assistant coach with the New York Jets, Denver Broncos, and several other teams in a 25-year NFL coaching career.After playing as a quarterback at Sacramento State University and briefly in the NFL, Knapp began his coaching career at Sacramento State. His first NFL coaching job was for the San Francisco 49ers, and he moved on to coach the Atlanta Falcons, Oakland Raiders, Seattle Seahawks, and Houston Texans.