Poku moved to the Atlanta Silverbacks of the NASL on January 24, 2014. During his time at the club he made 25 appearances, scoring twice, including a winning goal in the 91st minute against MLS side Real Salt Lake in the fourth round of the US Open Cup. Silverbacks manager and technical director Eric Wynalda described Poku as one of the best players in NASL, adding that he "might be too good for the MLS too".
