Lasse Olsen is a Norwegian

Norway

Norway , officially the Kingdom of Norway, is a Nordic unitary constitutional monarchy whose territory comprises the western portion of the Scandinavian Peninsula, Jan Mayen, and the Arctic archipelago of Svalbard and Bouvet Island. Norway has a total area of and a population of about 4.9 million...

 footballer

Football (soccer)

Association football, more commonly known as football or soccer, is a sport played between two teams of eleven players with a spherical ball...

 who plays for Mjøndalen

Mjøndalen IF

Mjøndalen IF is a Norwegian sports club from Mjøndalen, Buskerud, Norway.-Football:The club have won the Norwegian Cup three times, 1933, 1934 and 1937...

. He played for Gjelleråsen

Gjelleråsen IF

Gjelleråsen Idrettsforening is a Norwegian sports club from Gjelleråsen in Nittedal, founded 6 March 1935. It has sections for association football, floorball, swimming, gymnastics and skiing. Their club colours are green and white....

, Strømsgodset and Aalesund.

After the 2008 season, his contract with Aalesund was not renewed. He initially contemplated retirement, but in late December he was signed by SK Herd

SK Herd

Sportsklubben Herd is a sports club from Ålesund, Norway. It has sections for association football, handball and swimming, and was founded on 22 August 1932....

 together with former teammate Karl Oskar Fjørtoft

Karl Oskar Fjørtoft

Karl Oskar Fjørtoft is a Norwegian footballer who played for Hødd, Rosenborg BK, Molde FK, Swedish team Hammarby IF and Aalesund....

.

He is the son of former Vålerenga player Terje Olsen.