Fabián Cornelio Balbuena González (born 23 August 1991) is a Paraguayan professional footballer who plays as a centre back for Premier League club West Ham United and the Paraguay national team.
He played for Cerro Porteño PF, Rubio Ñu, Nacional and Libertad in the Paraguayan Primera División, before joining Corinthians of Brazil in 2016. He played 120 games for Corinthians, winning the Campeonato Paulista twice and the Campeonato Brasileiro Série A once, and was named in the latter’s 2017 team of the year. In 2018, he signed for West Ham.
First called up on 19 March 2015, Balbuena made his full international debut for Paraguay national team on 31 March by starting in a 1–0 friendly loss against Mexico at the Arrowhead Stadium. He was also named among the 23-man squads for the 2015 Copa América and the Copa América Centenario. He made his first competitive appearance at the latter in the final group game, a 1–0 loss to hosts the United States in which he was substituted at half time for attacker Juan Iturbe.
On 14 July 2018, Balbuena signed for Premier League club West Ham United on a three-year deal, for an undisclosed fee. He made his debut on 12 August in a 4–0 defeat by Liverpool. On 27 October he scored his first goal for the Hammers to open the scoring at Leicester City, but deflected Wilfred Ndidi’s long-range shot into his own net for the equaliser; he was the first Paraguayan to score in England’s top division since Antolín Alcaraz in May 2012.