Green Bay Packers running back Eddie Lacy has been placed on injured reserve, the team announced Thursday.

Details on the move weren't disclosed, but Lacy requires surgery to repair an ankle injury, a source told ESPN's Adam Schefter.

Lacy was officially ruled out of Thursday's game against the Chicago Bears on Wednesday, and recent reports had suggested that he was facing a potential multi-week absence.

The IR stint means that he'll have to miss at least eight weeks before the Packers can decide whether to use their lone return designation to bring him back for the stretch run.

Either way, an already disappointing Packers offense is now without its featured running back for most, if not all, of the remaining games on the 2016 schedule.

With James Starks still several weeks away from making his return from a knee injury, recently acquired running back Knile Davis should be in line for a lead role sooner rather than later.

Wide receiver Ty Montgomery is reportedly expected to see significant work out of the backfield Thursday night as Davis gets acclimated to the offense, and Don Jackson has been promoted from the practice squad to provide further depth at the position.