Julio César Domínguez Juárez[a] (born 8 November 1987), sometimes known as Cata, is a Mexican professional footballer who plays as a centre-back for Liga MX club Atlético San Luis.

[4] At the age of 18, Domínguez made his debut on 29 April 2006 in a home match against Pachuca which resulted in a 3–2 win for Cruz Azul.

[6] He has remained with Cruz Azul, having originally started as a pure centre-back, Domínguez has proven his versatility with solid performances as a right-back.

Domínguez was called up by Miguel Herrera for the 2015 Copa América, playing all 3 games against Ecuador, Chile and Bolivia.

[10] Domínguez was called up again in 2018 during Ricardo Ferretti's interim of the national team but did not see any playing time.