Quarterback Aaron Rodgers, the latest Green Bay Packers player to visit the infirmary, could be sidelined several weeks with a broken left collarbone.

Rodgers revealed the diagnosis to 540-AM ESPN listeners on his weekly radio show in Milwaukee, saying the injury was "significant" and that he was feeling "some pain" while adding he isn't sure when he'll return to game action.

Rodgers, 29, suffered the injury on the opening series of Monday night’s 27-20 loss to Chicago when he landed on his left (non-throwing) shoulder after Packers defensive end Shea McClellin sacked him.

NFL.com reported no definitive timetable for the 2011 league MVP exists but Rodgers “likely” would return in time for the playoffs.

Packers backup pivot Seneca Wallace finished 11 for 19 for 114 yards and an interception against the Bears.

Rodgers entered Monday night having completed 67 per cent of his 249 pass attempts for 2,191 yards and a 108.0 quarterback rating. He has 15 touchdown passes and four interceptions.

And since taking over for the equally dependable Brett Favre in 2008, Rodgers has only missed a game due to injury once, on Dec. 19, 2010, for a concussion.

His loss is devastating for a Packers team that is in a three-way tie for first place atop the NFC North. Green Bay, Detroit and Chicago each have 5-3 records.

After being sacked, Rodgers took a few warmup throws with backup Seneca Wallace but, following examination by medical staff, ran to the Green Bay locker room.

The Packers have been hit hard by injuries, with Pro Bowl linebacker Clay Matthews (thumb), wide receiver Randall Cobb (fibula) and tight end Jermichael Finley (neck) sitting out Monday’s game.

Rodgers got emotional at one point during his 15-minute radio appearance when he described the reception he got from fans as he walked back to sideline in green warmups in the third quarter.

"We put our bodies on the line. We do it because we love this game. But when I walked back out on that field, I'm getting a little choked up here just thinking about it," Rodgers said, "that was one of the top five moments of my career there."

Green Bay hosts the Philadelphia Eagles on Sunday.

With files from The Associated Press