Smith, 23, is 6-foot-1 and was initially selected by the Mavericks with the No. 9 overall pick in 2017. His career has faded somewhat after an outstanding rookie season, as he has since spent time with the Knicks and Pistons.
He appeared in 20 games with Detroit to finish last season, averaging 7.3 points and 3.7 assists. He then became an unrestricted free agent after the season, likely receiving a one-year nonguaranteed deal from Portland.
On the bright side for Smith, the Blazers only have 13 players under guaranteed contract and will have to add another before the season.