Stefphon Jefferson has been waiting for Saturday night for over three years.“Yes, definitely,” smiled the Nevada Wolf Pack running back. “Playing against Robbie Rouse always motivates me.”Rouse, the best running back in Fresno State history, will be at Mackay Stadium Saturday night (7:30 p.m.) when the Bulldogs come to town to take on Jefferson and the Wolf Pack.“They chose Robbie Rouse over me,” said Jefferson, who grew up in Visalia, Calif., dreaming of one day running the ball for nearby Fresno State.This game is personal for Jefferson.“They made their choice and they chose him,” Jefferson said. “So it’s kind of …