Not just Sopoaga, but they bring in two (I think) extra linemen. So they have 7 offensive linemen, Vernon Davis tight end, Sopoaga as fullback, Gore as running back, and Smith at QB. Maybe instead of 7 linemen they have 6 plus Peelle as a blocking tight end, I don't remember exactly. But still... that's a lot of beef. Then they just plow through everybody and get the first down.