SANTA CLARA, Calif. – There's no doubt the San Francisco 49ers need to unearth their running game.Its limited success didn't hurt them in a 34-28 Week 1 victory over Green Bay. However, with quarterback Colin Kaepernick and the passing game struggling in the 29-3 loss at Seattle on Sunday, San Francisco sorely missed its ground attack.The 49ers are averaging 3.5 yards per carry through two games, 17th in the NFL. Last season, they averaged 5.