Jaylen Brown Rebounds Prop is currently Over/Under 3.5 (+146/-204).
The money has been on the Under as it opened 3.5 @ -166 before it was bet down to 3.5 @ -204.
FACTORS THAT FAVOR THE OVER:
The Boston Celtics have been the 2nd-best offensive rebounding offense in the NBA over the last 5 games (offensive rebounds maintain possession and may therefore provide added opportunities for scoring and assists).