Maddox Renner plays beach volleyball for TSV Haunstetten and competes in the federation “Bayerischer Volleyball-Verband”.
Currently listed in BVV U16 Herren 2025 (rank 91, 73 points); BVV U16 Herren 2026 (rank 119, 29 points); BVV U18 Herren 2026 (rank 159, 38 points). Ranking seasons: 2025–2026.