Vikings starter Christian Ponder revealed Wednesday that he injured his ribs in last week's loss. He was listed as a limited participant on Wednesday's injury report. NFL Media's Aditi Kinkhabwala noted that Ponder finished last week's game, which is a good sign for his availability. Then again, Ponder missed a routine throw late in the fourth quarter that could have put the game away. Perhaps this injury gives the Vikings a chance to take a look at Cassel.