Stephon Castle Assists Prop is currently Over/Under 5.5 (-125/-115).
The money has been on the Over as it opened 5.5 @ -110 before it was bet up to 5.5 @ -125.
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).