Aguilera was a rare case. I forgot who he was traded for, but a quick look reminded me that it was the 'original' Frankie Rodriguez, who was a huge prospect at one time, and just as big of a bust. I think that his star had dimmed with the Red Sox a bit before the trade. At any rate, having lived up there at the time, I'm fairly certain that Aguilera wanted to return to the Twin Cities because he lived up there year round and had children in school there. He also had 10/5 rights, which probably sparked some discussions with the Twins before he was traded. Greinke doesn't have those kinds of ties to Milwaukee. The only other time that I can remember this happening was with Jim Slaton, who was traded to Detroit for Oglivie. He spent a full year in Detroit and then signed as a free agent with the Brewers. That said, he had a much longer history with the Brewers, and more importantly back in those days, free agents were limited to negotiate with only a handful of teams that 'drafted' them in the reeentry draft. Believe it or not, but back then the Brewers were very aggressive with free agent contracts, and probably had the best offer.