Redd strained a ligament in his surgically repaired knee in Milwaukee's win over Detroit on Oct. 31. Redd missed nine games, returned for three and has missed the previous two after soreness returned following a loss at Oklahoma City on Nov. 27.
The Bucks have been hit hard by injuries despite a 9-7 start.
Luke Ridnour also hurt his left hamstring late in Monday night's win. He's day-to-day on the trip to Washington and Detroit.