The San Francisco 49ers head into the 2013 season extremely healthy.Just two players were listed on the injury report Friday for Sunday's game against the Green Bay Packers. Cornerback Nnamdi Asomugha (collarbone) and running back LaMichael James (knee) were listed as questionable.Asomugha is expected to play and be the No. 3 cornerback. James is expected to be out for a couple of weeks.