No reason to bet an open parlay. Just parlay it yourself as you go. The only time you would get better odds in a parlay is a three-teamer at 6-1, when true odds are 5.96 to 1 at -110. Not worth it, even for a three-teamer. Plus, you can always get the best line if you parlay it yourself, since you have all of your books at your disposal to bet each leg of the parlay with. Additionally, you don't have to finish the parlay within a specific time period, and some bets could also be with reduced juice or a free half point. Never, ever bet an open parlay. That's my take.
