Arizona Cardinals running back Adrian Peterson (neck) is inactive versus the Los Angeles Rams on Sunday.
Peterson was unable to practice this week but was still a game-time decision. With AP out of action, Kerwynn Williams will likely start but expect a heavy dose of D.J. Foster as well with Williams playing with cracked ribs.
Peterson has rushed for 529 yards and 2 touchdowns in 156 carries with the Cardinals and New Orleans Saints this season.