Baker, a late first-round draft pick in 2008, has started 41 of 44 career games.
Early in his rookie season, Baker had surgery to repair a herniated disk.
Rookie wide receiver Julio Jones, the No. 6 overall pick in the draft, has practiced twice this week after missing two games with a strained left hamstring. His participation was limited Wednesday.
Tight end Tony Gonzalez didn't practice because of a sore back, but he's expected to play Sunday.
Copyright 2011 by The Associated Press