Cassel_2013The Minnesota Vikings said Friday that backup quarterback Matt Cassel will start for the Vikings against the Pittsburgh Steelers on Sunday over Christian Ponder, who suffered a rib injury in Week 3.

The Vikings made the announcement early Friday after practice in London, where the Vikings and Steelers will play the NFL’s seventh game in England on Sunday.

Ponder did not practice Friday. The third-year Vikings starter revealed Wednesday that he hurt his ribs in the Vikings’ loss to the Cleveland Browns last Sunday.

Source: Kevin Patra,