American forward Joe Gyau has signed a three-year professional contract with Hoffenheim in Germany's Bundesliga. The 19-year-old from Silver Spring, Md., has been with the club in its youth program, and made his debut for the first team on Feb. 8 in the German Cup quarterfinal loss to Greuther Fuerth. He played for the U.S. under-23 team that was eliminated last month in Olympic qualifying.