According to Rosenthal, one MLB source told him that the chances of Upton playing elsewhere next season are "80-20."
It's unknown which teams are actually involved in talks with the Diamondbacks, but there's no doubt that several teams are interested.
Last season, Upton had a no-trade list that consisted of the New York Yankees, Cleveland Indians, Boston Red Sox and Chicago Cubs. Rosenthal reports that a source notified him that the list has since changed.
If that's the case, then really any team could be in play for the young outfielder.
Any team with excess young pieces should at least attempt to work out a deal for Upton. He is a top talent in the league, and there's no telling when another opportunity to acquire a player of his caliber will present itself.
Top prospects and major league-ready arms could be needed to get a deal done, though Rosenthal believes that Elvis Andrus of the Texas Rangers could be the centerpiece of a potential deal if the Texas Rangers get involved.
The GM meetings started Wednesday, and Upton may very well be the talk of the meetings. If Rosenthal is correct, it's just a matter of time before Upton is moved.