Colin Dupuy

Colin Dupuy weighs 67kg. The next lightest player at Castres is thirteen kilos heavier, and Levan Chilachava, the heaviest, is very nearly double him.

He is French, 1.73m, and was born on 25 June 2006, which also makes him the youngest player at the club.

Those numbers point to scrum-half, and the squad data confirms it. Nothing else in the professional game is built like that.

The public record holds nothing further — no encyclopedia entry, nothing at France age-grade level under his name, nothing in the club’s own season summaries. This page is not going to invent a youth club or a debut to fill the space.

The position ahead of him is settled. Jérémy Fernandez is a one-club man who took the shirt in 2023, kicks the goals and scored 182 points in a season, and Gauthier Doubrère has covered behind him for four years. Neither is close to finished.

Sixty-seven kilos is also a genuine obstacle rather than just a number. A modern nine is cleared out of rucks by forwards more than twice his weight, and most players that light either add ten kilos in their early twenties or do not last.

What is documented is a place on a Top 14 roster at an age when most players are still in an academy. It gets rewritten when there is more.