Marvin Lee Rittmüller (born 7 March 1999) is a German professional footballer who plays as a defender for I liga club Stal Rzeszów.
Career Rittmüller made his professional debut for 1. FC Heidenheim in the 2. Bundesliga on 27 September 2020, coming on as a substitute in the 57th minute for Florian Pick against FC St. Pauli, with the away match finishing as a 4–2 loss.
On 1 September 2025, Rittmüller signed with 1860 Munich in 3. Liga.
On 22 July 2026, Rittmüller joined Polish club Stal Rzeszów on a one-year contract.
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