I'd speculate that the Jazz likely have had a deal on the table that would bring them back a draft pick in the mid-late teens, which is why they were able to get a workout with Mitchell. Mitchell has since ascended out of reach.
There are a bunch of teams outside the top 10 that aren't excited about their draft position. Several teams are reportedly reluctant to draft a big--incl. Charlotte, Detroit, Indiana, Miami, Chicago and OKC. Any one of those teams are candidates to move their pick. Indiana is probably now going into rebuild mode given the Paul George situation.
It's possible some agents aren't excited about their player getting lost amidst Utah's front-court depth. Still, I'm surprised the Jazz didn't bring in Terrance Ferguson.