Pittsburgh Penguins defenseman Kris Letang is considered week-to-week with a lower-body injury, head coach Mike Sullivan announced Friday.

Letang exited Monday's game against the Boston Bruins during the third period, but it's unclear what exactly caused the ailment.

The veteran defenseman has recorded four goals and 12 points in 15 contests this season. He also ranks 10th league-wide with an average of 25 minutes of ice time per game.

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