Bailey, an undrafted rookie from Duke, spent the first two games of the season on the Steelers' practice squad.
Russell, an undrafted free agent out of the University of Minnesota last year, carried seven times for 21 yards in three games last season.
Steelers cornerback Deshea Townsend will sit out a second consecutive game Sunday in Philadelphia because of a heel injury. He hasn't practiced either of the last two weeks.
Bryant McFadden, who had an interception in the Steelers' 10-6 victory over Cleveland last Sunday, will replace Townsend.
Copyright 2008 by The Associated Press