Career
On 23 May 2013 he replaced Michael Uchebo in the promotion/relegation game between Cercle Brugge and Royal Mouscron-Péruwelz after 86 minutes. Cercle lost the game by two goals of John Jairo Ruiz, but in spite of this result for Cercle this meant they remained in the Belgian Pro League because of their large point advantage. Alessio Staelens is son of the former international football player and current Cercle Brugge coach Lorenzo Staelens.