Joe Thornton has gone under the knife.
The San Jose Sharks forward had an arthroscopic procedure performed Thursday afternoon to address an issue with his right MCL, general manager Doug Wilson revealed Thursday night.
The GM said no timetable has been established for Thornton's recovery, despite estimating Wednesday the 38-year-old would likely be out for several weeks.
Thornton collided with teammate Mikkel Boedker in Tuesday's game against the Winnipeg Jets.
The troublesome knee is not the same one Thornton injured last season.
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