[header] How to bet on baseball games [title] Establish a relationship with a bookmaker. [step] While you can only legally place bets with a bookmaker in a handful of u.s. states. Bookmakers can still be found throughout the u.s. and operate regularly. 
You can find a bookmaker through a trusted source, a fellow sports gambler, or through a recommendation. You're advised to take caution if you approach a bookmaker through the black market.