 Pari gbolohun ti o tẹle: Määttä ni yiyan akọkọ gbogbogbo ni 2011 Canadian Hockey League Import Draft, o si dun fun ẹgbẹ ọdọ ọdọ Finnish ni 2011 IIHF World U18 Championships ati 2011, 2012 ati : 2013 World Junior Ice Hockey Championships. Àwọn ojúewé wọnyí jápọ mọ: A mọ Määttä fun agbara igbohunsafẹfẹ rẹ ati IQ hockey, a pe orukọ rẹ si akojọ Finland fun Awọn ere Olimpiiki Igba otutu 2014 bi ọmọ ọdun 19. 