Derek Carr threw three touchdown passes, including a nifty 52-yarder to Amari Cooper, and Oakland turned two interceptions of Philip Rivers into 10 points on its way to a 37-29 victory over the Chargers on Sunday in what could be the last showdown between the AFC West foes played in San Diego. Cooper, the first-round draft pick out of Alabama, caught a short pass from Carr on an inside screen and raced through the defense to give the Raiders a 30-3 lead just before halftime. Sebastian Janikowski kicked the first of his three field goals, from 29 yards, and Carr found Walford for an easy 23-yard score and a 17-3 lead early in the second quarter. The Chargers played without star tight end Antonio Gates (knee) and safety Eric Weddle (groin), and rookie running back Melvin Gordon was benched for the first half, apparently more punishment for his two fumbles in a gut-wrenching 27-20 loss at Green Bay. The Chargers and Raiders apparently were spooked into action after St.