Adams signed with the Trail Blazers in July of 2020 as a substitute player for the NBA restart in Orlando. Adams did not appear in any of Portland's seeding games, but he saw action in three playoff games in Round 1 against the Lakers. Adams made his postseason debut in Game 2 of the series, playing 10 minutes off the bench and finishing with four points, two rebounds and two assists. In 21 total playoff minutes, Adams recorded six points, three rebounds, two assists, and a steal. Adams spent much of the regular season with the Wisconsin Herd of the G League. In 33 appearances (32 starts), Adams posted 21.5 points, 5.7 assists, 5.1 rebounds, and 1.8 steals in 32.7 minutes per game. Due to his excellent play with the Herd, he was named to the 2019-20 All-G League First Team.

Undrafted out of St. Bonaventure, Adams appeared in 34 games with the Hawks during his rookie season. He saw 12.6 minutes per game and also drew one start. Adams averaged 3.2 points, 1.9 assists and 1.8 rebounds. He also shot 34.5 percent from the field, 33.8 percent from three and 77.8 percent from the charity stripe. In the four games that Adams saw at least 20 minutes, he averaged 9.0 points, 4.0 assists, 3.5 rebounds and totaled five steals and one block. His best performance of the season was Mar. 3 during a five-point with over the Bulls on the road. Adams posted a season-high 14 points (5-9 FG, 4-7 3Pt), along with four assists and four rebounds in 26 minutes. His other season highs were, respectively, seven assists, five rebounds, four steals, four three-pointers and one block. Atlanta finished the season 29-53. They played at the fastest pace (103.9) in the league.