This could be a case of one's man trash is another man's treasure for the Mavericks.
While the Dallas Mavericks have presumably finished most of their offseason business following the signing of Dante Exum, Dallas could still make a trade to shed one more player in lieu of making room for Exum, and the Mavericks still have the third of their two-way slots available ahead of the start of next season.
Dallas had some impressive showings from some of their own talent on their Summer League roster, as someone like Maxwell Lewis could be a candidate to get the last two-way spot, but the Mavericks have to look across the league to determine their best course of action here, as their are plenty of other players who had solid Summer League stints and there are even some young flyers that teams are punting on early.