( CNN ) -- A missing Ohio State University football player complained about concussion symptoms before he disappeared , his parents told police . Kosta Karageorge , a reserve defensive lineman , was last seen about 2 a.m. Wednesday , according to a tweet sent from his personal account . In a copy of the missing persons report obtained by CNN , Susan Karageorge told police she received a text from her son about 1:30 a.m. that said , `` I am sorry if I am an embarrassment but these concussions have my head all f***ed up . '' She added that her son has had several concussions and confusion `` spells . '' Karageorge is a wrestler and football walk-on , according to CNN affiliate WCMH . The 22-year-old , a fifth-year senior , missed football practice at 6 a.m. Wednesday . `` 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 . '' Pelfrey said police are following up multiple leads , including video from a store in east Columbus , Ohio . The family and volunteers have also ramped up their search efforts , posting fliers around town . Karageorge `` was a hard worker on the field and pleasant off the field . He has been an important player in practice for us , right up until the time he was reported missing , '' OSU football coach Urban Meyer said in a statement . `` If anyone knows anything about his whereabouts , please help his family and contact the authorities . '' Team physician Dr. Jim Borchers said that the team was not able to discuss or comment on Karageorge 's medical care . `` First and foremost , our primary concern is for the health , safety and welfare of Kosta . ... We are confident in our medical procedures and policies to return athletes to participation following injury or illness , '' Borchers said . Karageorge 's sister , Sophia , told Cleveland.com that he was upset about something Tuesday night and that his roommates said he went for a walk . His cell phone was last pinged about 2:30 a.m. Wednesday , according to his sister . CNN 's Patrick Cornell contributed to this report .
Football : Kosta Karageorge complained about concussions , according to a police report . He has n't been heard from since Wednesday , according to his family . The 23-year - old missed practice on Wednesday . Police say they 're still treating this case as a missing persons case .