He had little success in this grade as Cork GAA dominated the Munster Championship. Fox later joined the Tipp under-21 team, however, he missed the teams Munster final victory in 1979.
Despite having modest achievements in this level, Cork GAA's dominance of the Munster Championship overshadowed his efforts. Fox subsequently joined the Tipp under-21 team but failed to participate in their 1979 Munster championship triumph.