Rubuta ci gaba don wannan sakin layi - Ya zuwa shekarar 2013, mafi kyawun wasan Seifert a Gasar Cin Kofin Duniya ya zo ne a 2011, lokacin da ya lashe lambar azurfa a matsayin memba na kungiyar 'yan gudun hijira ta Jamus 5000m. Kyakkyawan aikinsa na mutum a Gasar Cin Kofin Duniya ya kasance 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.