Kammala wannan jumla: A shekara ta 2017, Koepka ya lashe gasar farko ta farko ta hanyar da'awar
Gasar cin kofin US Open a Erin Hills, Wisconsin. Nasarar da ya yi ta daidaita shi don rikodin mafi ƙarancin maki na US Open a 16 a ƙasa (wanda ya yi daidai da rikodin Rory McIlroy na 2011).