I don't think dumping Dozier and rolling with Polanco would help the rebuild necessarily. Dozier was the better player in the minors, he's the better player today. Its possible, maybe likely, Dozier would remain an asset through the rest of his contract, and it also seems possible that if the Twins did roll with Polanco, that in 12 months they'd be faced with the familiar dilemma of- continue to play a below-average player, hoping he figures out MLB pitching, or, try to sneak that player through waivers at risk of losing him for little/no return? If you look at the worst 2B in baseball by fWAR, they are almost all teams that are or should be rebuilding- Cesar Hernandez Phillies 0.9 Jed Lowrie Athletics 0.2 Johnny Giavotella Angels 0.4 Josh Harrison Pirates 0.5 Starlin Castro Yankees -0.4 Brandon Phillips Reds -0.2 whereas the "buyers" ie. contenders, are pretty well set at 2B. So because of the roster dilemma Polanco could easily cause, and the 2B market looking like it skews towards the rebuilding side, Polanco would be the guy I'd shop, not Dozier.