Steelers players normally must take part in the final full practice of the week on Fridays before they can play on Sundays.
Roethlisberger, listed as questionable on the injury report, has started the Steelers' last 28 games.
Roethlisberger felt soreness in his throwing shoulder during the Steelers' 34-13 loss Sunday at New England, but never left the game.
Steelers backup quarterback Charlie Batch, a combined 3-0 as a starter in 2005 and 2006, ran the starting offense in practice on Wednesday and Thursday. Batch hasn't started since throwing three touchdown passes against Miami in a season-opening 28-17 victory last year.
Copyright 2007 by The Associated Press.