Buuxi weedha soo socota: Wuxuu xirfadiisa ciyaareed ka bilaabay Horyaalka Sare ee Iswiidhan oo uu la ciyaaray Färjestads BK iyo kooxaha Horyaalka Adduunka ee Junior ee Iswiidhan. Waxaa ku
1998 Entry Draft, Berglund wuxuu noqday doorashada saddexaad ee New Jersey Devils, isagoo lagu doortay wareegga labaad oo ah 37-aad ee guud ahaan. Wuxuu sii waday inuu u ciyaaro Färjestad ilaa 2001, markii uu la saxiixday Devils. Wuxuu ka ciyaaray horyaalka hoose ee Albany River Rats, kooxda Devils, laakiin wuxuu bilaabay inuu u ciyaaro Devils naftooda xilli ciyaareedkii dambe. 1-dii Maarso 2004, isaga iyo saaxiibkiis Victor Uchevatov waxaa loo beddelay Florida Panthers si ay ugu beddelaan Viktor Kozlov.