He currently plays for BK Olympic, wearing the number 21 shirt. At the international level, he represents Sweden U20. He plays primarily as a Defender.

His most recent move was a from Angelholms FF to BK Olympic on 2025-07-31.

Throughout the Sweden Division 1 2025, casper nilsson featured in 27 matches, averaging 0 tackles, 0 interceptions, and 0 clearances per game, while blocking 0 shots per game.