Michigan State freshman forward Kenny Kaminski will be out for four to six months after having surgery on his right shoulder.
Kaminski was injured while playing against teammates during the summer.
He had surgery on the same shoulder last fall while attending Medina High School in Ohio.
The 6-foot-8, 245-pound Kaminski will likely redshirt this season, giving him four more years of eligibility with the Spartans.
He averaged nearly 20 points, more than 10 rebounds, three assists and almost two assists as a junior in high school.
He missed much of last season because of his injured shoulder.
Michigan State opens the season Nov. 9 in Germany against Connecticut.