Houston Rockets star center Alperen Sengun is expected to miss the remainder of the regular season with a Grade 3 ankle sprain, per Stadium.Sengun reportedly avoided a "major injury," per ESPN ...

Grade 3: The UCL is ... Grade 1 or 2 UCL injuries are sometimes called a UCL sprain. ... This is a physical test where your doctor will put pressure on your UCL after raising your lower arm 30°.