Henson was injured during his season debut Saturday against the Indiana Pacers. He played eight minutes while tallying three points, three rebounds, two steals and two blocks in Cleveland's 110-99 win.
Henson missed most of last season with a wrist injury sustained while with the Milwaukee Bucks. Henson had already been slowed this season by ankle and groin injuries.
Henson has a $500,000 bonus in his contract if he appears in 75 or more games this season. The injury timeline puts that bonus in jeopardy.