William Powell\'s 9-yard scoring run early in the fourth quarter Friday ended an Oakland comeback bid and boosted Arizona to a 31-27 over the Raiders. Oakland rallied to tie the contest with 13 third-quarter points that came on a 1-yard run by Lonyae Miller and a 7-yard fumble return for a touchdown by Hall Davis. Arizona regained the lead with a 73-yard, 8-play drive that ended with Powell\'s touchdown. The Cardinals took a 24-11 halftime advantage, with Justin Bethel recording the highlight by blocking a punt, chasing the ball halfway across the field, picking it up and returning it 19 yards for a score. Oakland\'s Carson Palmer completed 13-of-24 passes for 107 yards with an interception. Arizona won for the first time in three exhibition games. Oakland, which failed to score in its pre-season opener against Dallas, dropped to 0-2.