He was a journalist who played bridge as an avocation. The team retired together after its 1969 Bermuda Bowl world championship and returned together for a successful defense of the quadrennial World Team Olympiad championship in 1972. D'Alelio then retired permanently for health reasons.
World championships
Bermuda Bowl (10) 1957, 1958, 1959, 1961, 1962, 1963, 1965, 1966, 1967, 1969
World Open Team Olympiad (3) 1964, 1968, 1972
Runners-up: none. Italy did not finish second between 1951 and 1976. European championships
European Open Teams (3) 1956, 1957, 1958
Runners-up
European Open Teams (3) 1955, 1962, 1963.
As a member of the team he had played four systems with four partners.