His family moved to Brasília, where Dário would be invited to play for CR Vasco da Gama's youth team.
He began playing professional football with América Futebol Clube in 1964.
Monterrey for six months before returning to Brazil with Fluminense Football Club.
[2] Dário Alegria won state championships in 1966 (Campeonato Paulista with Palmeiras) and 1971 (Campeonato Mineiro with América) and had brief stints with Clube de Regatas do Flamengo, Botafogo de Ribeirão Preto, Associação Atlética Caldense, Villa Nova Atlético Clube and Olaria Atlético Clube, before he finished his career with Centro de Ensino Unificado de Brasília Esporte Clube.
[2][3] Dário Alegria made his only appearance for the Brazil national team in a friendly against Uruguay on 7 September 1965.