Niemann ayaa ku guuleystay billaddii Mark H. McCormack ee 2017 markii uu ahaa ciyaaryahanka ugu sareeya ee ka ciyaara Golf-ka Xamaaliga ah ee Adduunka markii la soo gabagabeeyay xilli ciyaareedkii xagaaga, sidaas darteedna uu helay gelitaanka US Open 2018
iyo tartanka Open Championship ee sanadka 2018. Wuxuu ku guuleystay Horyaalka Latin America ee 2018 wuxuuna sidoo kale galay tartanka Masters ee 2018.