 In addition to goal scoring, he was known for his offensive movement and "runs" off the ball, which "always [attracted] the attention of defenders".Born in Schiedam, Koevermans began his career with the amateurs of Excelsior'20, then went to Sparta Rotterdam, playing there for five seasons.In 2005, Koevermans switched to AZ, where he started as a second-choice centre forward, although he bagged numerous goals.