Daniel Leo Gretarsson is a 30-year-old professional football player from ISL. He currently plays for Sonderjyske, wearing the number 4 shirt. At the international level, he represents Iceland. He plays primarily as a Defender. He stands at 185cm tall and weighs 80kg. His preferred foot is Left. His current market value is estimated at 450K €.

His most recent move was a from Slask Wroclaw to Sonderjyske on 2023-06-30.

Throughout the Danish Superliga 2025-2026, Daniel Leo Gretarsson featured in 20 matches, averaging 2.6 tackles, 1.4 interceptions, and 4.3 clearances per game, while blocking 0.2 shots per game.