September 21, ➔ Find the Best USA Sports Betting Sites! The main focus in the USA is on the Big Four sports: Football, Basketball, Baseball and Hockey. From offshore sportsbooks, US sportsbooks, or even NFL betting sites dedicated solely to professional football. Finding the best place to take. Nevada sports books take in close to $3 billion in wagers each year. Roughly 95 percent Football The latest odds for AFL and NFL games. more info. Football.