Answer
Anthony Annan won the Norwegian league in 2009 with Rosenborg BK. Annan, a Ghanaian midfielder, joined Rosenborg in 2008 and quickly became a key player for the club. In the 2009 season, Rosenborg dominated the league, winning the title by a comfortable margin. Annan played a crucial role in the team's success, contributing with goals and assists throughout the campaign.