The sister of Ohio State defensive tackle Kosta Karageorge says his family has reported him missing. The 22-year-old left his apartment, then uncharacteristically missed two practices and didn't check in.

Sophia Karageorge says her brother apparently was upset, and roommates said he went for a walk, dressed in all black.

His sister says he didn't take his wallet or motorcycle. She says he has a history of sports-related concussions, including one a month ago, and his family was concerned that he might have become disoriented.

More From ESPN Western Colorado