Marvin Keller is a London-born Swiss goalkeeper for Young Boys. He joined Grasshoppers' academy at age seven, signed professionally there, and moved to FC Wil in 2021, where he became a regular starter. Young Boys signed him in 2023, and he won the Swiss Cup final that year before a loan to Winterthur. Keller has represented Switzerland at youth levels and received a senior call-up in 2025.
