Pittsburgh (KDKA)- The depth on the Steelers defensive line could be put to the test for at least the next couple of weeks.

Head coach Mike Tomlin announced today that defensive end Brett Keisel suffered a grade one PCL strain in his right knee and is questionable at best for Sunday’s game at Indianapolis.

A grade one PCL strain could take as long as 4-6 weeks to heal.

Former #1 pick Ziggy Hood will replace Keisel in the starting lineup. This injury should also lead to more playing time for 2011 #1 pick Cameron Heyward.

Last season, Keisel was added to the AFC Pro Bowl team for the first time in his career.

Cornerback Bryant McFadden (hamstring), wide receiver Jerricho Cotchery (hamstring) and left guard Chris Kemoeatu (knee) are also questionable for the Colts game.