Combining these is a breeze with BetMGM’s easy-to-use interface and favorable reputation, plus it offers competitive odds on all available markets each day. People have been parlaying outcomes for as long as there have been betting odds, since gamblers love to get bigger payouts even if that means extra risk.īetMGM is one of the best online sportsbooks for parlay betting since it offers hundreds of betting markets every day. Parlay betting, or combining multiple betting markets under one wager, is one of the most popular ways to wager on sports.