The two sports where Americans think the most cheating occurs are boxing (21 percent) and horse racing (18 percent). It's probably because of their long and checkered histories of shady characters throwing fights and fixing races (or is it fixing fights and throwing races?). In football (16 percent), baseball (14 percent), cycling (13 percent) and track and field (three percent), cheating usually means doping or using banned substances like steroids. After enduring baseball's steroid era and plenty of other scandals where cheaters evaded punishment for years, one of the sad truths in today's world of sports is that no one can be sure that the result of any given contest is ever 100 percent legitimate.