Missouri has become the latest state to launch sports betting. The state began allowing bets Monday with some limitations, including that people won't be allowed to make prop bets for games involving Missouri college players. Prop bets are a popular type of wager often focused on what individual players will do in a game. The restriction highlights concerns over prop bets following recent scandals involving both professional and collegiate athletes. Missouri's restriction is less sweeping than in some states, which have banned prop bets on all college athletes. The restriction was included in a constitutional amendment authorizing sports betting that voters narrowly approved last year.