Dee ihe na-aga n'ihu maka paragraf a - Ọ malitere ọrụ ya na Swedish Elite League na Färjestads BK na Swedish World Junior Championship teams. Na 1998 Entry Draft
N'afọ 2009, Berglund ghọrọ nhọrọ nke atọ nke New Jersey Devils, a họpụtara ya na agba nke abụọ dịka nhọrọ 37th n'ozuzu. Ọ gara n'ihu na-egwu maka Färjestad ruo 2001, mgbe ọ bịanyere aka na Devils. Ọ na-egwuri egwu na obere egwuregwu Albany River Rats, ndị Devils 'ndị mmekọ, ma malite igwu egwu maka ndị Devils n'onwe ha mgbe e mesịrị n'oge ahụ. Na 1 Machị 2004, a gbanwere ya na onye otu ya Victor Uchevatov na Florida Panthers iji gbanwere Viktor Kozlov.