Starting his career for XIII Catalan, Delaunay marked the 1980s with said club winning several French Championship titles in 1982.
He later joined the other club of Perpignan, AS Saint Esteve, with which he won a new French Championship title in 1989.
Delaunay made his debut for France in 1980 against a touring New Zealand side.
He went on to play in 17 test matches for France, including against touring Australian sides in 1982 and 1990, and in matches that were part of the 1985–1988 Rugby League World Cup and 1989–1992 Rugby League World Cups.
[1] Delaunay later worked for Union Treiziste Catalane and the Pia Donkeys.