Yup... If you get to 88 and you’re having a hard time finding your car keys, or remembering your children... That likely isn’t a result of concussions. Troy Aikman is 53 and having trouble finding his car keys... That IS a result of concussions... He had several, so I assume his head is pretty soft.
My nephew had a pretty severe concussion he got playing high-school football. Fortunately he listened to his dad and hung-up the cletes at age 17. Now a third year college biomedical student and doing great.