- [Fiѕher] The Mavericks, NBA sources tell DallasBasketball.com, want to trade Trey Burke. And in addition to the usual trade complications & stumbling blocks that might come with any trade, in play here is the fact that Burke is still "studying'' whether he wants to be vaссinated against CОVID-19. https://www.si.com/nba/mavericks/news/source-dallas-mavericks-trade-trey-burke-covid-issue-news-luka-doncic 418 comments nba