The left-sided defender, who is comfortable as a wing-back, was confirmed as our second summer signing of 2025.
Leon, who is the youngest of nine children, began his career with Cerro Porteno and made 33 appearances for the Paraguayan club, scoring four goals.
He played nine times at the Under-20 South American Championship in 2025 and found the net in the game against Argentina.
After his move to Manchester, he will become the first Paraguayan to appear for the Reds at senior level.