There are several reasons why our system may not permit you to place a parlay.
When selecting a parlay you may not play both sides of the same game at BetOnline. If you do play both sides of the same game, any winning wagers on the game will be canceled.
Also, keep in mind that there are certain lines that cannot be placed in a parlay together, and certain lines that cannot be parlayed, for example, Team Totals, Spread with Asian Handicap, and Total Points with Asian Handicap. Certain sports, such as MMA, Boxing, and Auto Racing, are not offered for parlay bets either. Proposition bets/futures cannot be included in parlays. To learn more about parlays and our parlay Rules, click here.