Delaunay is a youth product of
Le Havre, and helped
Quevilly-Rouen into the
Ligue 2 after consecutive promotions. Delaunay made his professional debut for Quevilly in a 1–0
Coupe de la Ligue loss to
Orléans on 8 August 2017. He made his Ligue 2 debut in a 4–1 loss to
Nîmes on 3 November 2017. ==International career==