Kammala jumla mai zuwa: Ya zuwa shekarar 2013, mafi kyawun wasan Seifert a Gasar Cin Kofin Duniya ya zo ne a shekarar 2011, lokacin da ya lashe lambar azurfa a matsayin memba na tawagar 'yan gudun mita 5000 na Jamus. Kyakkyawan wasan da ya yi a gasar zakarun duniya shi ne a
2012, lokacin da ya zo na 4 a cikin mita 500. Ya kuma lashe lambar azurfa a matsayin memba na tawagar 'yan wasan Jamus a gasar zakarun Turai ta 2010.