The Pittsburgh Steelers might have suffered a setback even more significant than their 30-15 loss to the Miami Dolphins on Sunday.

Quarterback Ben Roethlisberger has a torn meniscus in his left knee and will undergo surgery on Monday, the Pittsburgh Post-Gazette reported. There is no timetable for his return, according to the report.

Roethlisberger, who has an NFL-high 15 touchdown passes, was injured in the second quarter and briefly left the game before returning in the second half.

Landry Jones entered the game when Roethlisberger went to the locker room and likely would be fill-in starter.

If the Steelers have to turn to Jones, the offense could take a significant hit. Roethlisberger missed four games last season with a sprained medial collateral ligament and bone bruise, and Pittsburgh went 2-2 with Jones and Michael Vick providing little spark at quarterback.

The Steelers host the New England Patriots next Sunday.