ARLINGTON, TX - AUGUST 29: Adrian Peterson #28 of the Minnesota Vikings looks on from the sidelines as the Vikings take on the Dallas Cowboys in a preaseason game on August 29, 2015 in Arlington, Texas. (Photo by Tom Pennington/Getty Images)
ARLINGTON, TX - AUGUST 29: Adrian Peterson #28 of the Minnesota Vikings looks on from the sidelines as the Vikings take on the Dallas Cowboys in a preaseason game on August 29, 2015 in Arlington, Texas. (Photo by Tom Pennington/Getty Images)