He currently plays for Fortuna Koln, wearing the number 33 shirt. He plays primarily as a Goalkeeper. His current market value is estimated at 10K €.

His most recent move was a from SC Fortuna Köln U19 to Fortuna Koln on 2024-07-01.

In the German Regionalliga 2025-2026, Lennart Stollenwerk played 6 matches, averaging 0 interceptions, 0 tackles, and 0 clearances per game.