He is on the books of Curico Unido and wears shirt number 24. His main role on the pitch is Forward. His stronger foot is Left. His estimated market valuation currently stands at 200K €.

His latest transfer saw him join Curico Unido from Curicó Unido U21 via on 2023-12-31.

During the CHI Liga de Ascenso 2025 campaign, Williams Genaro Sáez Leiva made 23 appearances, scoring 0 goals and adding 0 assists. He averaged 0 goals per match from 0 shots, with 0 on target.