Stefan MarkolfStefan Markolf is the first deaf German professional footballer.CareerAfter joining the professional squad of 1. [FSV Mainz 05] in 2007, where the defender was mostly substituted, he was signed by third division club Wuppertaler SV in 2008. After eight years he returned to KSV [Hessen Kassel].PersonalMarkolf was born deaf. Thanks to speech therapy, he has nearly perfect pronunciation of the spoken language. In spite of his hearing loss, he has a good overview in the football matches. He wears special hearing aids while playing.