He plays primarily as a Defender. His preferred foot is Left. His current market value is estimated at 10K €.

His most recent move was a from Breidablik to Fylkir on 2024-03-01.

Throughout the Iceland Besta-deild karla 2024, Arnar Númi Gíslason featured in 1 matches, averaging 1 tackles, 0 interceptions, and 0 clearances per game, while blocking 0 shots per game.