Overview
- Hamburger SV extended Katterbach's contract through 2027 and immediately sent him to Eintracht Braunschweig on loan with a purchase option confirmed by both clubs.
- HSV will continue to pay part of his wages so Braunschweig can sign him at low cost and the two clubs share the financial risk of his recovery.
- Braunschweig sporting director Benjamin Kessel said Katterbach fits the club's tactical plan as a modern left back who can play on the line and in the half-space.
- Katterbach missed the entire 2025/26 first-team season after a second ACL injury and being left out under coach Merlin Polzin, and he described recent months as "not easy."
- The deal follows a common strategy where clubs extend lingering contracts before loans to preserve asset value and use second-tier playing time to rehabilitate a player's market stock.