Career
He joined Lyn in 2007 from the club"s youth ranks, and in 2007, 2008 and 2009 he played 21 games and scored 4 goals in the Norwegian Premier League. He has also played for Norway national under-21 football team Lyn went bankrupt in 2010, and Knudsen trained with Manglerud Star until joining Lyn Fotball in August.