The probability of hitting a two team parlay is ½ by ½ = win probability as for parlays and using an $11 bet (the house pays 10 -11 on straight wagers).
i hit a 25 open team parlay a few months ago. it was $10 and it ended up being I hit a 10 team teaser that all covered the regular spread if that counts. The odds of getting hit by lightening in California are probably better. NFL Betting - I've hit 9 out of 10 in a parlay. Which way.
Parlays are the most popular of the exotic sports bets. The true odds of hitting a 10 - team point parlay are while the payoff is generally around. NFL Free Picks and Parlays NBA, NCAAF, AND MLB 10-10-2016 Tampa Vs Carolina Panthers O/U