Ghana duo Jonathan Mensah and Harrison Afful featured for Columbus Crew SC who ended their pre season by beating Seattle Sounders 1-0 on Saturday to win the Carolina Challenge Cup.
It was 2017 MLS SuperDraft selection Niko Hansen who scored the only goal of the match in the 83rd minute.
A quick turnover deep in Seattle's half allowed Trapp to slip Hansen through the Sounders backline and in on goal.
In a 1-v-1 with goalkeeper Stefan Frei, Hansen coolly slid the ball just inside the near post.
Mensah and Afful will turn attention to their MLS opener against Chicago Fire next Sunday.