Viking quarterback Christian Ponder has bruised ribs according to Jim Souhan of the Star Tribune and may not play Sunday.  Ponder isn't expected to practice today and if he can't play Sunday then Matt Cassel would start in his place.

Ponder has struggled this season throwing for 691 yards with 2 touchdowns and 5 interceptions.  The Vikings are 0-3 and will play the Pittsburgh Steelers Sunday at noon (CT) in London, pregame on WJON at 11am.