When certain outcomes are considered “correlated”,then those bets cannot be parlayed together. Conversely, you will be able to parlay the Moneyline or puck line with the total of that same game (i.e. Flyers Moneyline + over 5.5 goals scored). ...

Why are some parlays not allowed?

A correlated parlay is a wager in which you have two bets that are tied together. If one of the wagers wins, your chances of winning the second bet increases. Most sports books are not going to accept these types of wagers because if they did, they wouldn't stay in business very long.

What bets can you not parlay?

The Types of Bets You Can Include in a Parlay

A variety of other bets that can be included in a parlay bet: moneylines, game totals, bets against the spread. However, you can't parlay a bet against the spread and a moneyline bet from the same game.