Although Green Bay has not revealed more information, NFL Network's Ian Rapoport reported that Bennett has a torn rotator cuff.
The 30-year-old then sat out practice Wednesday and was listed as having a shoulder injury as Green Bay began preparations for its game Sunday at Chicago.
For Bennett, it means a return to New England, where he won a Super Bowl last season.
Bennett used his Instagram Story - the same avenue he used to post during the bye week that he was "pretty sure" he would retire after this season - to tell his side of the story.
The only question is if Bennett still has a desire to play anymore. They even gave me an xray as well. So they tried to (expletive) me before they thought I would (expletive) them.
The Packers were thinking surgery was necessary for Bennett's injured shoulder. So I got 3 other opinions from doctors who all said I need to get it fixed.
Bennett has 24 catches for 233 yards on the season.Bennett's contract has two years remaining for about $14 million. The last medical conversation I was involved with in regards to Marty, they were talking about scheduling surgery.
During the bye week I got off anti inflammatories to clean my system and could really feel the pain.
"Any time you lose one of your top-caliber players it's an adjustment", McCarthy said on Thursday. A powerful line-of-scrimmage blocker with five consecutive seasons of 50-plus receptions, Bennett provided fresh options to a potent offense.