TAMPA, Fla. -- Charlie Batch doesn't pretend to be a savior.

His job is to help Pittsburgh continue winning while Ben Roethlisberger is on suspension, and the 35-year-old quarterback just wants to do his part.

"These opportunities don't come often right now," the 13-year veteran said Sunday after making his first start in nearly three years and helping the Steelers remain unbeaten with a 38-13 rout of the Tampa Bay Buccaneers.

"Everybody knows Ben's the starter," Batch added. "One thing I didn't want to do was be that weak link, to go out there and not be able to provide a spark or put this team in the end zone."

Batch threw for 186 yards and two long touchdowns to Mike Wallace, Rashard Mendenhall rushed for 143 yards and one score, and Pittsburgh's defense delivered another strong performance with Brett Keisel returning an interception 79 yards for a fourth-quarter TD.

The Steelers improved to 3-0 for the first time since 2007, despite playing without Roethlisberger, who's serving a four-game suspension for violating the NFL's personal conduct policy.

Dennis Dixon started the previous two games, but was lost to a knee injury last week. That opened the door for Batch.

"This is where we expected to be at this point," Batch said. "I know a lot of people on the outside did not believe that. But for us, we're just taking it one game at a time."

Wallace scored on catches of 46 and 41 yards during a stretch where Pittsburgh, which did little offensively the first two weeks of the season, scored on four straight possessions to build a 28-6 halftime lead.

Tampa Bay's Aqib Talib intercepted Batch's first pass of the day to set up a 40-yard field goal, but Bucs fans -- seemingly lost in the sea of gold-clad Steeler supporters who gave Raymond James Stadium the look and feel of Heinz Field -- had little to cheer about the rest of the way.