Update: Oakland Roots have confirmed that they have transferred Ariel Mbumba to Columbus Crew 2 of MLS Next Pro. “Ariel was a young player we saw a lot of potential in here locally,” said Technical Director Jordan Ferrell, via the team’s official site. “One of the goals of the Club is to help nurture and … More Transaction: Oakland Roots transferred Ariel Mbumba to Columbus Crew 2