Adonis Frías is an Argentine centre-back from Florencio Varela. He came through Defensa y Justicia and became an important part of the team that won the 2020 Copa Sudamericana and the 2021 Recopa Sudamericana. His performances in Argentina earned him a move to León in Mexico, where he continued as a central defender. Frías later joined Santos, bringing experience from Argentine domestic football and continental competition in South America.