*Club domestic league appearances and goals, correct as of 23:52, 21 May 2024 (UTC) ‡ National team caps and goals, correct as of 08:11, 30 June 2024 (UTC)
Schlotterbeck debuted for SC Freiburg on 9 March 2019, coming on as a half-time substitute for Philipp Lienhart in the 2–1 home win against Hertha BSC.[6] In his final match for Freiburg, the club lost the DFB-Pokal Final on penalties but Schlotterbeck was awarded the man of the match.[7]
Loan to Union Berlin
On 31 July 2020, Schlotterbeck joined Union Berlin on a one-year loan.[8]
Borussia Dortmund
On 2 May 2022, Borussia Dortmund announced the signing of Schlotterbeck on a five-year deal, starting from the 2022–23 season.[9] He joined for a reported €25 million transfer fee.[10] In the 2023–24 season, he achieved the highest tackling success rate in the Bundesliga at 71%, in addition to winning possession over 240 times, he also played a crucial role in his club's qualification to the Champions League final.[11]
Schlotterbeck is the nephew of former professional footballer Niels Schlotterbeck, who played for Freiburg.[16] His older brother, Keven, is a professional footballer who played the 2019–20 season at Union Berlin on loan from SC Freiburg, to which he returned for the 2020–21 season. [17] Schlotterbeck's cousin, Sandrine, appeared on the seventh series of the German edition of Love Island in 2022.[18]