Wendt started his career with IFK Norrköping in 1975. He later moved to 1. FC Köln, Tennis Borussia Berlin, 1. FC Kaiserslautern, Seiko, Standard Liège and SC Freiburg. He helped Standard Liège to reach the UEFA Cup Winners' Cup Final in 1982, where they were beaten 2–1 by FC Barcelona. He also played in the 1978 FIFA World Cup for Sweden national football team.
