The search for a missing Ohio State University (OSU) football player is wearing on Saturday, but the inclination that his disappearance is linked to past concussions may have been confirmed.

According to CNN, Kosta Karageorge, an OSU senior and defensive lineman on the football team, sent his mother a text message before going missing. He was last seen at 2 a.m. Wednesday morning when he left his apartment to take a walk.

Susan Karageorge told CNN her son texted her at 1:30 a.m. Wednesday saying, "I am sorry if I am an embarrassment but these concussions have my head all f---ed up." She said her son had shown signs of confusion and other concussion after effects.

"Right now we're still treating this as a missing persons report," Sgt. David Pelphrey told CNN affiliate WSYX. "We have no reason to believe otherwise."

Karageorge sister Sophia told the Columbus Dispatch that her brother left the apartment wearing black up and down: his boots, sweatpants, hoodie and beanie. A former wrestler at OSU, Karageorge is six-foot-five and weighs 285 pounds.

She also said her brother is the kind of player who would show up to practice under any circumstance, yet he missed it both Wednesday and Thursday. In a statement obtained by ESPN, OSU head football coach Urban Meyer called Karageorge a "hard worker" and "important in practice."

OSU alumni and current members of the football team are offering cash rewards for information that leads to Karageorge's location, the Dispatch reported. His former high school football coached organized a search party on Friday attended by at least 150 people.

His family said Kosta was treated for his concussions and followed the doctor's instructions.

"First and foremost, our primary concern is for the health, safety and welfare of Kosta," Buckeyes team physician Dr. Jim Borchers said in a statement. "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."

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