ESPN says ex - rugby players could advise NFL players on matters of safety . The Seattle Seahawks implemented rugby techniques last year . With a concussion crisis looming , football safety is becoming a hot topic . The World Cup - winner is a huge NFL fan .
Johnson says ex-rugby players could advise NFL teams on art of tackling . The Seattle Seahawks implemented rugby techniques last season . With a concussion crisis looming , player safety is becoming a hot topic . The World Cup-winner is a huge NFL fan .