Minnesota Vikings quarterback Sam Bradford is inactive for Sunday's game against the Pittsburgh Steelers due to a knee injury.
Case Keenum will start in Bradford's absence.
It's a significant blow, especially as Bradford is coming off a scintillating performance in Week 1 against the New Orleans Saints.
However, Bradford's knee issues are only expected to keep him out for this week, NFL Network's Ian Rapoport.
Bradford was limited in practice throughout the week after reportedly experiencing pain and swelling in his twice surgically-repaired knee.
Keenum is a solid backup, having started 14 games over the past two seasons, but could struggle against a strong Steelers defense.
