Steelers quarterback Byron Leftwich injured his left knee on Thursday night in the team's preseason finale against the Panthers. Leftwich sprained his left knee and is scheduled to undergo an MRI. Pittsburgh will already be without usual starter Ben Roethlisberger for at least a few games to begin the season, making Dennis Dixon their likely starter. "It's an opportunity, I guess, but it's unfortunate for Byron for what he went through. But this team has to continue to go forward," said Dixon. "I know once he's going to come back he's going to give us nothing but tremendous support."