The 23 - year - old Karlsson won the 2011 - 12 Norris Trophy .
The 23 - year - old Karlsson will be in the mix for the defenceman - of - the - year award again this year .
The 23 - year - old Karlsson won the 2011 - 12 Norris Trophy and will be in the mix for the defenceman - of - the - year award again this year .