O. Boesen

Oskar Boesen was born in Valencia to Danish parents and spent his first fifteen years in Spain, starting out at Valencia CF's youth academy before the family moved to Denmark for boarding school in 2020, when he joined Hvidovre IF's youth ranks. He switched to Silkeborg IF's academy in the summer of 2022 and signed a trainee contract there in March 2023.

The midfielder made his senior debut on 6 April 2023 in the Danish Cup against Sønderjyske, and scored his first senior goal that November in a 5–1 cup win over his old club Hvidovre IF. That form earned him a full-time contract with Silkeborg until June 2027, signed in August 2023. He went on to make 35 appearances for the club's senior side, and was part of the Silkeborg squad that lifted the DBU Pokalen in 2023–24, beating AGF 1–0 in the final, though he did not feature in that match itself.

Boesen has also represented Denmark at youth level, appearing twice for the U19s in the 2024 UEFA European Under-19 Championship group stage.

In January 2026, he moved on loan to Norwegian First Division side Stabæk, where he made four appearances before the switch became permanent in a different direction: on 29 June 2026 he joined Esbjerg fB on a four-year deal running to the summer of 2030.