From Matt Maiocco at our affiliate site CSNBayArea.com:
GREEN BAY, Wisc. -- Running back Brandon Jacobs and return man Ted Ginn were among the 49ers' seven inactive players announced 90 minutes prior to the team's regular-season opener against the Green Bay Packers at Lambeau Field.
Kyle Williams will return punts for the 49ers. The 49ers could use Perrish Cox as the backup punt returner. Kendall Hunter is expected to handle the kick-return duties.