Oakland Raiders running back Michael Bush, right, carries the ball as quarterback Jason Campbell, left, looks on during football training camp in Napa, Calif., Thursday, July 29, 2010. (AP Photo/Eric Risberg)

Photo by: Eric Risberg

Oakland Raiders running back Michael Bush, right, carries the ball as quarterback Jason Campbell, left, looks on during football training camp in Napa, Calif., Thursday, July 29, 2010. (AP Photo/Eric Risberg)