1971 was less successful than the preceding seasons, but the middle four years of the 10-year war saw the greatest success for Hayes against Michigan, although the teams fell short of repeating their 1968 national championship. Archie Griffin began his college football career in 1972, taking advantage of new NCAA eligibility rules that allowed freshmen to compete at the varsity level. In his second game, sent in against North Carolina late in the first quarter, Griffin set a new Buckeye rushing record with 239 yards and led the team in rushing for the season with 867.