Rosenborg BK
In 1997, Boateng signed for Rosenborg BK in Norway for 5 million Norwegian kroner, and spent the next three seasons in the Tippeligaen with Rosenborg BK playing a total of 10 Tippeligaen matches, scoring only one goal for the team. In the 2000/2001 season he played two UEFA Champions League matches. During his time at Rosenborg BK, he was four times champion of the Tippeligaen.