Career
She previously played for Football Club Honka in Finland"s Naisten Liiga and Umeå IK. Despite playing 90 minutes in all 22 of Umeå"s league matches, her contract with the club was not extended at the end of the 2011 season. The following season she remained in Sweden with Piteå IF.
Westerlund was part of the Finland squad at the 2006 Fédération internationale de football association U-20 Women"s World Championship. Her senior Finland women"s national football team debut came in January 2008, against China.
By the time of Union of European Football Associations Women"s Euro 2009, hosted by Finland, Westerlund was established in the squad.
She played in three matches, including the 3–2 quarter-final defeat by England. In June 2013 Westerlund was named in national coach Andrée Jeglertz"s Finland squad for Union of European Football Associations Women"s Euro 2013.
Typically a defensive midfielder with her club team, Westerlund was used as a centre back by Finland. She required a stitch in a head wound during Finland"s opening match, a 0–0 draw with Italy.