NCAA D1 FBS rules permit up to 85 scholarships across the full team including students of all years, not 85 for just freshman. If we estimate 85/4.5 = 18.9 scholarships for freshman, then that would be 18.9/(713 +1192), which would result in slightly less than 1% of the entering freshman receiving football scholarships, well under the 38% of the class with a 3.5 UW GPA. One of many possible sources for 6% varsity athletes is at Tulane at https://www.forbes.com/colleges/tulane-university-of-louisiana/ . It’s a lower percentage than Harvard and similar because Tulane has fewer teams.