Once a student reaches the age of 19yrs 9 months, he or she is ruled ineligible. Chances are, Ridley was held back early in elementary school. Some families elect to hold their kids back due to their birthday. Spring and Summer birthdays are the most common. My son has a May birthday and we chose to hold him back a year at kindergarten. I didn't like the idea of him turning 18 in May then off to college in June. Now, he will turn 19 in May and then go to BAMA in June, a year older and wiser. I did it for maturity purposes. Some do it for athletic purposes only.