Not knowing much about it I figured that the race must have been after Ryun graduated. Nope, looks like Ryun was at Kansas as late at 1969.
He won the NCAA title in 1967.
Seems to me as long as you are still in college and can compete for your team it should count as an NCAA record.
Once the NCAA meet of your final year rolls around, that should be it. If someone sets a record while redshirting it shouldn't count.
So someone explain this.