Mario Saint-Supéry Fernández was born on 14 April 2006 in
Málaga. He made his debut with the senior team of
Unicaja Málaga on 16 March 2022, in a
Basketball Champions League fixture against
BC Oostende. He was loaned out to
CB Tizona in the middle of the 2023–24 season. He subsequently joined
Bàsquet Manresa in August 2024, again on loan from Unicaja. He made his debut with the
Spanish senior national team in a
EuroBasket 2025 qualification fixture against
Slovakia. On 30 June 2025, Saint-Supéry was reported to be joining the
Gonzaga Bulldogs for their
2025–26 season. Saint-Supéry made the list for the
EuroBasket 2025, covering the vacant slot left by
Lorenzo Brown. ==Career statistics==