 On a recommendation, Walker went to Chile and signed with First Division Club, Universidad Católica.They loaned him out to Club Deportivo Huachipato of Chile's First Division in 1998, in which we was named Team MVP, then U. Catolica brought him back the following year.He became the starting goalkeeper for the club, playing in multiple Copa Libertadores tournaments, which included wins against Argentina's Boca Juniors and Brazil's Flamengo.