The primary hurdle for a 24-year-old is the NCAA five-year clock. This rule generally dictates that a student-athlete has five calendar years to complete four seasons of eligibility, starting from the moment they graduate high school. For most, this window closes by age 23, making a return to the gridiron at 24 a significant regulatory challenge.
However, the situation changes for those who have utilized medical hardships, served in the military, or navigated the junior college system. While the standard path is narrow, non-traditional student-athletes can occasionally find a route back through specific waivers or by competing in divisions with different oversight.