Marten Ketelsen plays beach volleyball and competes in the federation “Deutscher Volleyball-Verband”.
Currently listed in DVV Herren 2026 (rank 313, 21 points); SHVV Erwachsene Männer 2026 (rank 15, 2424 points); SHVV FLENS Beach-Tour Männer 2026 (rank 18, 22 points). 67 tournament results are documented since 2011, most of them in 2025 (9). Marten has achieved 23 podium finishes, including 8 golds, 7 silvers, 8 bronzes. Most recently documented: place 9 at Kategorie A+ (Jul 18, 2026). The best tournament result is place 1 at Kategorie A (Dec 20, 2025). Most frequent partners in the results: Momme Wittmüss (32×), Max Behlen (8×), Mats Jürgensen (3×).