Uruguayan prop Reinaldo Piussi Mendoza played in Major League Rugby during the 2024 season. He represented the Miami Sharks for his entire MLR career.

He represented Oyonnax in the French Pro D2 between 2018-2020, before returning to Uruguay and joining the Uruguayan High Performance system. He made his full test debut for Los Teros against Tonga in 2022, before playing with Peñarol in Super Rugby Americas in 2023, winning the competition. Following the SRA season he was selected to represent Uruguay at the 2023 Rugby World Cup in France, playing against the host nation as well as Namibia.

On 30th December 2023, the Miami Sharks announced the signing of Reinaldo Piussi for their inaugural MLR season in 2024. At 285lbs, Piussi is one of the heaviest players to ever play in MLR. He scored 1 try in his 8 MLR appearances (7 starts) for the Sharks during their admirable inaugural season, and on November 14th, 2024, the Miami Sharks announced the return of Reinaldo Piussi for the 2025 Campaign.