Darmstadt completed the signing of United States youngster McKinze Gaines from Wolfsburg on Thursday.
The 19-year-old winger joins on a three-year contract at relegated Darmstadt, though Wolfsburg retain a buy-back option.
Texas-born McKinze Gainzes leaves Wolfsburg following a successful season in the club's under-19s, which saw his side reach the semifinal of the German championships.
However, the United States youth international felt it was time to move on after 22 league games, seven goals and nine assists, putting pen to paper at Darmstadt, who have already started their preseason after their relegation from the top flight last term.