Bobby Portis Blocks Prop is currently Over/Under 0.5 (+200/-278).
The money has been on the Over as it opened 0.5 @ +205 before it was bet up to 0.5 @ +200.
FACTORS THAT FAVOR THE OVER:
The Cavaliers have played at the 9th-most up-tempo pace-of-play in the NBA since the start of last season, which ought to lead to more plays for the Bucks.