Woodson sustained the injury Sunday in the Packers' 30-20 victory over the St. Louis Rams -- a game in which he made five tackles and didn't show any signs of a problem.
Monday X-rays, however, indicated the 15-year veteran broke the same collarbone as he did in Green Bay's victory over Pittsburgh in Super Bowl XLV.
Woodson, an eight-time Pro Bowl pick and former NFL Defensive Player of the Year, has amassed 38 tackles, 1 1/2 sacks and an interception through seven games this season.
Martin Bashir resigns from MSNBC over Sarah Palin comments
Texas principal bans speaking Spanish, stirs controversy