AP source: Roethlisberger undergoes left knee surgery

Pittsburgh Steelers quarterback Ben Roethlisberger (7) looks to pass during the second half of an NFL football game against the Miami Dolphins, Sunday, Oct. 16, 2016, in Miami Gardens, Fla. (AP Photo/Wilfredo Lee)

Pittsburgh Steelers quarterback Ben Roethlisberger (7) looks to pass during the second half of an NFL football game against the Miami Dolphins, Sunday, Oct. 16, 2016, in Miami Gardens, Fla. (AP Photo/Wilfredo Lee)

PITTSBURGH (AP) — The Pittsburgh Steelers will likely head into their showdown with Tom Brady and the New England Patriots without Ben Roethlisberger.

A person with knowledge of the procedure says the Steelers quarterback underwent surgery to repair the meniscus in his left knee on Monday.

The person spoke to The Associated Press on condition of anonymity because the team had not released details on the nature of the injury.

Roethlisberger tweaked the knee in the second quarter of Sunday’s 30-15 loss to the Miami Dolphins and left briefly before returning. He underwent an MRI on Sunday night, which revealed the extent of the damage.

Roethlisberger’s injury was first reported by the Pittsburgh Post-Gazette.

There is no timetable on Roethlisberger’s return. Landry Jones will take snaps with the starters this week. Jones played in seven games last season while filling in for Roethlisberger, throwing for 513 yards with three touchdowns and four interceptions.