 Following the withdrawal of support for the Charlton women's team by the parent club, Aluko joined Chelsea Ladies in July 2007.In October 2008, Aluko's playing rights were obtained by St. Louis Athletica who named her as a post-draft discovery player.She was the team's leading goal scorer during the league's inaugural season with six goals, and also led in assists with four, making her one of the main reasons Athletica was able to climb from a last place in the first two months of the season to a commanding second by the end.