Whakaotihia te rerenga e whai ake nei: I tiimata a Wisniewski i tana mahi hockey hukapapa rangatahi me nga Plymouth Whalers o te Ontario Hockey League (OHL) i te 2000. I tino pai ake ia tau ia tau, a, i tohua ia i te rauna tuarima, i te 156 o te katoa, e te Chicago Blackhawks i
Ko te tau 2002. I te timatanga o te tau 2003-04, i whakaingoatia ia hei rangatira mo nga Whalers. I taua tau, e 17 nga whaainga i eke ki a ia, e 11 i runga i te mana-tākaro. I mutu ia i te 24th i roto i te kaute katoa me nga tohu 70, te tuatoru i waenga i nga kaitautoko me nga tohu e ono noa iho i te OHL, i whakatauhia e te kaitautoko o Kingston Frontenacs a Bryan Rodney. Mo ana mahi, i whakawhiwhia a Wisniewski ki te OHL's 2004 Max Kaminsky Trophy hei kaitiaki tino rongonui. I riro ano ia i te whare o te roopu matua o te OHL, te Canadian Hockey League (CHL), te kaituku o te tau. Ko tenei whakaaetanga i whiwhi ai a Wisniewski i tetahi kirimana me Chicago, me te peke ki te Norfolk Admirals o te American Hockey League (AHL), te hononga rangatahi o te Blackhawks.