Kris Stone, Under Armour Senior Director of Basketball Sports Marketing, posted a picture to Instagram announcing Jackson had joined the brand:
Other draft-eligible prospects who have already agreed to endorsement deals include projected No. 1 overall pick Markelle Fultz, who signed with Nike, and Lonzo Ball representing the family-owned Big Baller Brand apparel line.
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Jackson is regarded as one of the best players available in this year's draft class. B/R's Jonathan Wasserman has the Kansas star ranked as the No. 3 player on his final big board.
After Thursday's draft, Jackson will know what uniform he will be wearing to start his NBA career. For now, though, he knows the brand of sneaker that will be on his feet for his first professional game.