Facundo Valentín Lencioni (born 14 February 2001) is an Argentine professional footballer who plays as a midfielder or winger for Gimnasia Mendoza. Lencioni came through the youth setup at Belgrano and made his debut on 25 April 2021 against Nueva Chicago in the Primera Nacional. He did not feature as Belgrano were promoted in the next season, but signed his first professional contract on 11 November 2022 and was then incorporated into the first team. He scored his first goal in the Liga Profesional on 25 October 2023 against Central Córdoba SdE in a 1–1 draw. After receiving limited opportunities at Belgrano, he moved back down to the Primera Nacional to join Gimnasia Mendoza on loan, joining for the season with a $500,000 purchase option for 50% of his economic rights. He became top scorer in the division in July as Gimnasia led the table, receiving plaudits for his standout performances. They reached the Primera Nacional final on 11 October against Deportivo Madryn and Lencioni scored a late penalty to make the score 1–1, before scoring in the penalty shootout to secure his side's promotion to the Liga Profesional. On 12 December 2025, Gimnasia announced that they had exercised his transfer option. He scored his first goal in the Primera for Gimnasia in a 1–0 win against Instituto on 9 February 2026.