He currently plays for Astoria Walldorf, wearing the number 10 shirt. He plays primarily as a Midfield. He stands at 173cm tall and weighs 67kg. His preferred foot is Right.

Across 22 appearances in the German Regionalliga 2025-2026, M. Waack registered 3 goals and 0 assists, while completing 0 key passes out of 0 total passes with a passing accuracy of -.