Roughly half the 127 FBS coaches -- 47.2 percent -- are under the age of 50. Among the Power 5 conferences, 43.1 percent (28 of 65 coaches) are in their 30s and 40s.

Who are the best young coaches? In their final appearance in the best-under-50 list, the two coaches whose teams played for the BCS title two years ago have had the most success before their 50th birthdays.

FSU’s Jimbo Fisher and Auburn’s Gus Malzahn, who will both hit 5-0 in October, lead the conversation of the top coaches under 50.