The recent Supreme Court ruling legalizing sports gambling nationwide has certainly created some profitable opportunities, but traders may not know where to place their bets. U.S. sports betting will see massive growth over the next five years, and a handful of stocks are positioned to benefit, Height Capital Markets analyst Stefanie Miller said in a Monday note. How To Play It Seven states have already legalized sports gambling, and Height projects the total number will climb to around 17 states in 2019. Miller broke down the companies with the most combined operational casinos in the 16 states excluding Nevada where Height expects state-sanctioned sports gambling. Of the publicly traded companies, the following four names have the most casino exposure in the key markets: Penn National Gaming, Inc. : 17 casinosCaesars Entertainment Corporation : 15 casinos.Pinnacle Entertainment Inc : 11 casinosEldorado Resorts Inc : 10 casinosSource