Grayson Allen Rebounds Prop is currently Over/Under 2.5 (-137/-137).
The money has been on the Under as it opened 3.5 @ -137 before it was bet down to 2.5 @ -137.
FACTORS THAT FAVOR THE OVER:
The Suns have been the best offensive rebounding offense in the league over the last 5 games (offensive rebounds maintain possession and can therefore lead to additional chances for scoring and assists).
FACTORS THAT FAVOR THE UNDER:
The Suns have played at the 2nd-least up-tempo pace in the league over the last 5 games.
The Celtics have played at the most lethargic tempo in the NBA this year, which should reduce plays for the Suns.