The 3 posts immediately above this mention something happening 'longer' either at BYU or with Mormons in general. There was no '9th year'. Nobody had NCAA elegibility all of those years. '8-1/2 years after graduation' was written. So what? He didn't use any elegibility during some of those years.
This confuses many who believe some important event happens upon HS graduation. The NCAA doesn't mandate that you finish within 5 years of that day. They just say you can only do 4 seasons of any single sport. Now, Covid added one, but BYU doesn't add any more on top of that. Nor does any church.
You are welcome to start at 20 or 22, but the date elegibility starts tolling is the only meaningful date. Nobody is still around 8 or 9 years after that. Their eligibilty clock didn't start upon graduation. So, you can be 10 years out from high school, but that is not a meaningful stat since the end of high school doea not equal the beginning of NCAA elegibility.