Marius Berntsen Olsen

Marius Berntsen Olsen (born 14 May 2001), commonly known as Marius Olsen, is a Norwegian professional footballer who plays as a centre-back for Ekstraklasa club GKS Katowice.

He previously represented Levanger and Kristiansund in Norway, making 50 appearances in the Eliteserien for the latter.

Club career

Early career and Levanger Olsen began playing football for Clausenengen before joining the youth set-up of Kristiansund in 2017. He subsequently represented Kristiansund at under-16, under-19 and reserve-team level.

In 2020, he moved from Kristiansund to Levanger, initially on loan and later on a permanent basis. Over three seasons in the Norwegian Second Division, Olsen made 58 league appearances and scored six goals for Levanger. Kristiansund recovered from a 2–0 first-leg defeat by winning the return match by the same score and secured promotion to the Eliteserien after a penalty shoot-out.

Olsen made 23 Eliteserien appearances in 2024 and a further 27 in 2025. By the end of his contract, he had made 81 first-team appearances for Kristiansund in all competitions and scored twice. His signing was announced on 4 March. He joined as a free agent on an initial contract until 30 June 2026, which included an option for two additional years.

He made his GKS and Ekstraklasa debut on 12 April 2026, starting in a 3–3 away draw with Lech Poznań. Olsen made four league appearances before the end of the season, starting each match. On 22 May, GKS activated the extension clause, prolonging his contract by two years, until June 2028.

Career statistics