Marius Berntsen Olsen is a 25-year-old professional football player from NOR. He currently plays for GKS Katowice, wearing the number 14 shirt. He plays primarily as a Defender. He stands at 190cm tall and weighs 81kg. His preferred foot is Right. His current market value is estimated at 600K €.

His most recent move was a from Kristiansund BK to GKS Katowice on 2026-03-03.

Throughout the International Club Friendly 2025, Marius Berntsen Olsen featured in 5 matches, averaging 0 tackles, 0 interceptions, and 0 clearances per game, while blocking 0 shots per game.