Buuxi weedhan soo socota: Qayb ka mid ah afar sano oo xirfadiisa ciyaareed ee yar yar ee TPS ee SM-liiga yar yar, Niittymäki waxaa doortay Flyers 168-aad guud ahaan
Sanadkii 1998 kii ayaa la soo doortay. Wuxuu sii waday inuu ku ciyaaro Finland TPS sanadka ugu horeeya ee ka soo baxa horyaalada da'yarta, wuxuuna ku guuleystay koobka Rookie of the Year ee horyaalka sare ee Finland. Kadib laba xilli ciyaareed oo kale oo uu la qaatay TPS, Niittymäki wuxuu u guuray Waqooyiga Ameerika si uu ugu biiro Philadelphia Phantoms ee Horyaalka Koleyga Ameerika (AHL). Markii Phantoms ay ku guuleysteen AHL Calder Cup Championship, waxaa loo magacaabay MVP ee playoffs. Kadib wuxuu u ciyaaray afar xilli ciyaareed Philadelphia Flyers ka hor inta uusan u saxiixin sidii wakiil xor ah Tampa Bay Lightning. Hal sano ka dib, wuxuu u saxiixay San Jose Sharks isagoo xor ah, laakiin ma uusan ciyaarin ciyaaro badan labadii sano ee la soo dhaafay sababo la xiriira dhaawacyada miskaha. Wuxuu ciyaaray xilli ciyaareedkiisii ugu dambeeyay kooxdiisa dhalinyarada ee TPS, wuxuuna ku dhawaaqay inuu howlgab noqday 2013.