Kosta Karageorge’s final text: “Concussions have my head all f–ked up.”

Missing Ohio State defensive tackle Kosta Karageorge sent this shocking text to his mother, Susan, at 1:30 a.m. Wednesday, shortly before she filed a missing-person report with Columbus police.

“I am sorry if I am an embarrassment, but these concussions have my head all f–ked up,” Kosta Karageorge wrote via The Columbus Dispatch.

The 22-year-old Ohio State senior was last seen at his apartment around 2:00 a.m. Wednesday. He was upset and went for a walk. He missed football practice that day and hasn’t been seen since, which his family said is uncharacteristic.

His sister, Sophia Karageorge, told The Dispatch that her brother, who wrestled for three years for the Buckeyes, has a history of sports-related concussions. The family is worried that he might be disoriented because of a concussion he suffered just one month ago.

“First and foremost, our primary concern is for the health, safety and welfare of Kosta, said Dr. Jim Borchers, Ohio State team physician. “While we are not able to discuss or comment about the medical care regarding our student-athletes, we are confident in our medical procedures and policies to return athletes to participation following injury or illness.”

Ohio State head football coach Urban Meyer said in a statement that he’s thinking about the family. He called Karageorge a “hard worker on the field and pleasant off the field.”

“We pray that he is safe and that he is found soon,” he said.

More than 150 volunteers posted 5,000 fliers about Karageorge in Columbus suburbs on Friday.

Karageorge was last seen wearing a black hoodie, black sweatpants and black boots.

He wasn’t carrying any identification.

He would have played in his final home game as a senior Saturday against Michigan.

Update: On Sunday, Karageorge was found dead in a dumpster of a self-inflicted gunshot wound.

Photo via Facebook/WBNS10TV