 If he slugs a grand slam, you'll win a share of $50,000 in bonus bets. Go to your BetMGM account, place a home run prop bet, and if it's a dinger with the bases loaded, you'll hit the jackpot or split the bonus bets with any other winners. BetMGM and GameSense remind you to play responsibly. 21 plus and present in Ohio. Gambling problem? Call 1-800-GAMBLE in partnership with MGM Northfield Park.