September 21, ➔ Find the Best Online Sports Betting Sites! reviews on legal online sportsbooks with our detailed guide on the best online gambling sites. Wagering on sports has come a long way since the days of the neighborhood bookie. Nevada legalized sports wagering in , becoming the only place in the. For as long as there have been sports, there has been sports gambling as well. Betting and sporting events go hand in hand, from bets as basic as picking the.