Audio: Vikings' Adrian Peterson

Appearing on the "Scott Van Pelt Show" on ESPN Radio, Minnesota Vikings tailback Adrian Peterson previews a video game matchup against Green Bay Packers nose tackle B.J. Raji. You won't want to miss that discussion, nor Peterson's revelation that most players assumed rookie Christian Ponder would be the Vikings' starter from the first day of training camp before veteran Donovan McNabb "came into the picture."