Already, at least 15 states ban prop betting in collegiate sports, according to data maintained by the American Gaming Association, a trade group. This summer, MLB Commissioner Rob Manfred told reporters he would like to see some limits on prop bets. In an interview, Maloney said eliminating legal prop betting will only move that activity into unregulated markets with no transparency. Illinois Gaming Board spokesperson Beth Kaufman told Stateline the regulatory agency doesn’t maintain a list of specific prop bets that are allowed. New Jersey lawmakers are also considering a separate bill to ban player-specific prop bets on college sports.