510 days ago - Two of the NFL’s youngest starting quarterbacks, former overall No. 1 picks JaMarcus Russell of the Raiders, who turns 23 on Saturday, and the 49ers’ Alex Smith, 24, lead their teams into Friday’s preseason opener at McAfee Coliseum armed with new and exciting weapons. But all the skill, speed and fresh strategies won’t carry these two storied franchises back to prominence without major improvement in the play of the men who never throw, run or catch the ball: the offensive line.