Pomykal, 19, enjoyed a break 2019 campaign in which he starred for Dallas as well as the US national team at the U-20 World Cup before earning his senior USMNT debut. In MLS, he started 20 matches, adding two goals and five assists.
Nelson, 21, was selected No. 10 overall in the 2019 MLS SuperDraft and made nine appearances during his rookie season. He was a standout at North Carolina for two seasons before entering the draft.
Dallas finished seventh in the Western Conference to earn an Audi 2019 MLS Cup Playoff berth before falling in Round One to the Seattle Sounders in a 4-3 extratime thriller.