Harrison Barnes Blocks Prop is currently Over/Under 0.5 (+350/-600).
The money has been on the Over as it opened 0.5 @ +360 before it was bet up to 0.5 @ +350.
FACTORS THAT FAVOR THE OVER:
The 9th-fastest tempo away team in the NBA over the last 15 games has been the Spurs.
The Spurs will likely get a boost in plays in this game from competing against the 6th-quickest pace-of-play team in the league over the last 5 games (the Pacers).