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With a Sunday night showdown looming against rival Chicago Bears, the Green Bay Packers' offensive line continued to face uncertainty on Thursday.

Left guard Josh Sitton and right guard T.J. Lang – team leaders in the trenches – again missed practice because of injuries. Both offensive linemen rode stationary bikes while teammates went through drills.

Sitton and Lang were injured Oct. 26 in the Packers' game against the New Orleans Saints. Sitton tore a ligament in his left big toe while pass blocking in the second half. Lang left the game with an ankle injury while blocking for an extra point attempt after Green Bay's first possession.

Lang has not spoken with the media this week. Sitton said Wednesday he would feel comfortable playing Sunday night without practicing during the week, if it came to that.

"I've always been a guy that liked to practice, and I felt like that's how I sharpen my ax," Sitton said while sitting at his locker. "But I think I'm to the point where as long as I can be in shape, then I think it's more beneficial to sit."

Elsewhere, the Packers are a picture of health.

Cornerback Sam Shields (knee) and safety Morgan Burnett (calf) also practiced again Thursday. Both missed the Saints game. Shields practiced Wednesday for the first time since a patella injury on Oct. 12 at Miami.

Defensive end Datone Jones (ankle) also practiced again. Jones said Monday he'll be ready to play against the Sunday. He's been out since the Packers' game against the Minnesota Vikings on Oct. 2.

Quarterback Aaron Rodgers practiced Thursday despite a strained hamstring.

Rodgers, Shields, Burnett and Jones were full participants in Wednesday's practice. The Packers will have one final practice on Saturday before facing the Bears.

-- rwood@gannett.com and follow him on Twitter @ByRyanWood

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