Westbrook has missed the last four games and six of the last seven with a concussion.
He practiced on the scout team this week, but the two-time Pro Bowler has not been medically cleared to play in a game. He will undergo another test next week.
Maclin left Sunday's win over the Giants with a torn plantar fascia, tissue at the bottom of his left foot.
Reid says tight end Brent Celek is questionable for Sunday but expected to play with back spasms and a sprained thumb.
Copyright 2009 by The Associated Press