AP

Ravens wide receiver Breshad Perriman aggravated his knee injury before last weekend’s game, NFL Network’s Ian Rapoport reported, and is out indefinitely after having arthroscopic surgery this week.

Rapoport reported that Perriman reinjured his PCL and that Dr. James Andrews did the surgery.

Earlier this week, Ravens coach John Harbaugh told reporters he was unaware of Perriman having a setback.

Perriman, a first-round pick last spring, was injured early in training camp and though he was cleared for a limited return to the field in late August he didn’t play in the preseason and is awaiting his NFL debut. Though Steve Smith Sr. has more than 300 receiving yards over the last two weeks, the 0-3 Ravens are still looking for playmakers to complement him.

Smith has 25 receptions on the season, more than twice the number any of his teammates have through three games.

The Ravens play Thursday night in Pittsburgh without starting tight end Crockett Gillmore, who left last week’s loss to the Bengals with a calf injury. The team had previously ruled Perriman out for the game.