Alex Rubén Díaz Borda (born 14 July 1999) is an Argentine professional footballer who plays as an midfielder for Chilean club Unión San Felipe. Club career. Born in Neuquén, Argentina, Díaz was trained at Centenario and started his career with Atlético Pacífico in 2017. After a stint with in 2018–19, Díaz moved to Chile and signed with Deportes Iquique in June 2019. Next, he played for San Luis de Quillota and Deportes Limache in that country. Back to Argentina, Díaz rejoined Sol de Mayo in June 2022. The next two years, he played for Cipolletti. In 2025, Díaz returned to Chile and joined Unión San Felipe. Personal life. Díaz is of Chilean descent. Díaz is nicknamed "Pope".