Ok. I've been thinking about this since my post last night, and I think the best comp for a trade of Fielder would be Miggy Cabrera. Both were young, talented power hitters with long-term questions about body-type/defensive positioning and several years of team control remaining (2 for Fielder and 3 for Cabrera). In Dec. 2007 Cabrera returned: Andrew Miller (2nd in 06-07 offseason) Cameron Maybin (1st in 06-07 offseason - 6th overall in 07-08) Dallas Trahern (8th in 06-07 offseason) Eulogio de la Cruz (6th in 06-07 offseason) Burke Badenhop Mike Rabello based on the timing of the trade, they didn't appear in either team's top 10 list in the 07-08 offseason, and while Maybin was 6th overall, he was the only player of the 6 in baseball's top 100 prospects in 07-08. Also Cabrera was traded with Dontrelle Willis who, despite coming off a bad year, was only 1 year removed from a phenomenal season, and the common perception was that he just needed a change of scenery and a winning environment. So, If we assume that Dontrelle might have returned Andrew Miller and Mike Rabello, that leaves: Cabrera for Maybin, Trahern, De La Cruz, and Badenhop - an A prospect, 2 Bs and a C. Accordingly, I think Ellsbury cold fill the role of A prospect. He was rated among the top 20 prospects in baseball his last year in the minors and, unlike some top prospects, has had a successful major league career so far, providing great speed and decent hitting at a tough defensive positon. I would also be willing to replace Ells with Casey Kelly - also probably an A prospect, though not as good as Maybin was. Bowden and Lars would be the B prospects - both were in the top 100 entering the season, and Lars was top 20. The C prospect could be any number of players. Kyle Weiland, Stephen Fife, Derrik Gibson, etc. Obviously personal preference would dictate the specific player in the deal, but I think that these guys fit the values of what would be expected in return. Edit: I think it's important to point out that I've said multiple times before that I don't think the Brewers should trade Fielder because they are a playoff contender right now and would likely be less so without him. I also disagree that Ellsbury is not special. He's a very good offensive player for a CF, and plays good defense there (despite his UZR this year). Also, unlike even the top prospects, he's a sure thing. his floor is high.