Dylan Harper Rebounds Prop is currently Over/Under 4.5 (+105/-139).
The money has been on the Under as it opened 4.5 @ -137 before it was bet down to 4.5 @ -139.
FACTORS THAT FAVOR THE OVER:
The Spurs will likely see a rise in possessions today from competing against the speediest pace-of-play road team in the NBA this year (the Toronto Raptors).