He currently plays for Aalesund FK, wearing the number 21 shirt. He plays primarily as a Midfield. He stands at 186cm tall and weighs 79kg. His current market value is estimated at 400K €.

His most recent move was a Free from Helsingor to Aalesund FK on 2025-07-12.

Across 2 appearances in the Norwegian Eliteserien 2025, Mathias Christensen registered 2 goals and 0 assists, while completing 4 key passes out of 68 total passes with a passing accuracy of 23.5.