Roethlisberger was injured Nov. 11 and has missed two straight games -- both losses for the Steelers.
Byron Leftwich first stepped in for Roethlisberger but he was hurt Nov. 18 against the Ravens. Batch started last week, a game in which Pittsburgh had eight turnovers in losing to Cleveland.
Batch is a 12-year NFL veteran who has started 54 of the 81 games in which he's appeared. He is 20-of-34 passing for 199 yards and three interceptions this season.
Roethlisberger is recovering from rib and shoulder injuries.
Leftwich suffered a broken rib in the first Baltimore game.
Safety Troy Polamalu has worked out with the team all week after missing seven games and is listed as probable for Sunday.
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ANGKOR WAT, Cambodia, June 18 (UPI) --Aircraft equipped with lasers have revealed a lost city near Angkor Wat in Cambodia, hidden for centuries under a dense forest cover, researchers say.