I think it's tough to trade Dozier, but I'd do it if the return was a starter very likely to be the Twins best starter as soon as 2017, 2018 at the latest. In general, I am very leery of trading established position players for potential pitching. It's just very difficult to know what you're getting with young pitchers. Very difficult. But in this case, as others have pointed out, I don't know where else needed pitching comes fom, Dozier has a lot of trade value, and Polanco makes trading a Dozier less risky.