Juan Cruz Mallía (born 11 September 1996) is an Argentine professional rugby union player who plays as a fullback for Top 14 club Toulouse and the Argentina national team.

Mallía can be described as a utility back, like James O'Connor or Adam Ashley-Cooper, being able to play from 11 to 15 and starting more than ten professional games in each position.^[2]

Mallía played for the Jaguares in Super Rugby. He made his Super Rugby debut against the Chiefs in May 2018.^[3]

In 2021, he won the European Rugby Champions Cup playing for Toulouse, scoring their only try in the final.^[4] A few weeks later, we won his first Top 14 title in a 18–8 win against La Rochelle in final.^[5]

Jaguares XV

• 1× Currie Cup First Division: 2019^{[citation needed]}

Toulouse

• 1× European Rugby Champions Cup: 2021^{[citation needed]}
• 1× Top 14: 2021^{[citation needed]}

Argentina XV

• 1× Americas Pacific Challenge: 2017^{[citation needed]}