Career
A tough-tackling defender, Mills made his professional debut for Limonense on 6 April 1975 against Alajuelense. He later played for Liga over two periods and had a stint abroad with Honduran side Motagua. He also played for Herediano and Saprissa.
He retired in September 1990.
Mills was capped by Costa Rica, playing 17 games and scoring 3 goals.