Marvin Keller

Keller began playing goalkeeper after his father bought him goalie gloves as a joke. He is a youth product of Grasshoppers, having joined their youth academy at the age of 7. He was promoted to their U21s in the 2019–20 season, and was called up to their bench as backup goalkeeper in the Swiss Challenge League. On 8 January 2020, he signed a professional contract with Grasshoppers until 2020 and was formally promoted to their senior team as third goalkeeper. After 12 years with Grasshoppers, he transferred to FC Wil on 8 June 2021. On 24 March 2022, he extended his contract with the club until 2024 after cementing the starting spot in the squad. He transferred to the Swiss Super League club Young Boys on 12 February 2023 after they activated his release clause after a season-ending injury to their starting goalkeeper David von Ballmoos. He made his professional debut with Young Boys in a 1–1 Swiss Super League tie with FC Zürich on 14 May 2023. He started 3 matches of the season as Grasshoppers won the 2023–24 Swiss Super League. He also started for Young Boys in the 2022–23 Swiss Cup final against FC Lugano on 4 June 2023 after the second goalkeeper Anthony Racioppi was out injured, and made crucial saves as his team won 3–2 to win the cup. On 13 September 2023, Keller joined Winterthur on loan.

Born in London, England, Keller is of Swiss descent. He is a youth international for Switzerland, having played up to the Switzerland U21s. Keller was called up to the senior Switzerland squad for the friendly matches against Mexico and the United States on 7 and 10 June 2025, respectively. On 20 May 2026, Keller was selected in the 26-man squad for the 2026 FIFA World Cup.

Club

As of match played 1 September 2026

International

As of match played 31 May 2026

Grasshoppers

Swiss Challenge League: 2020–21 Young Boys

Swiss Super League: 2022–23 Swiss Cup: 2022–23