Bruce Gradkowski solidified his backup quarterback spot...

Bruce Gradkowski solidified his backup quarterback spot for the Oakland Raiders with a steady showing as the Raiders lost 28-24 to their Bay Area rivals, the San Francisco 49ers.

Gradkowski threw for 202 yards and two touchdowns after Jason Campbell left with an injury. He did not play in the first two exhibition games because of a groin injury and was in danger of falling behind Kyle Boller on the depth chart. But he completed 14 of 22 passes and led Oakland to scores on his first three drives. He threw touchdown passes to Louis Murphy and Zach Miller and set up a 57-yard field goal by Sebastian Janikowski.

Before leaving Campbell got off to another strong start, completing four passes for 67 yards on an 81-yard touchdown drive. Darrius Heyward-Beyhad two of his three catches on the drive, fullback Marcel Reece had a 34-yard reception and Michael Bush scored on a 1-yard run.

Bush also left the game with a broken left thumb and does not know how serious it is. DT Desmond Bryant had an elbow injury.

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