With a parlay, you can combine multiple wager types ( bets against the spread, moneyline bets, over/under betting, etc.) into a single stake. When you wager on two (or more) games at once, your chances of success get smaller, but your payouts get significantly bigger. To win the parlay, you must correctly select the outcome of every event included. A parlay is a bet that connects the outcomes of multiple sporting events in a single wager.