"....I'll tell you I was very disappointed not to work with Sean Casey. ... I would have approached him about re-negotiating his contract to see if we could have worked something out there.....He'll be a free agent at the end of the year, too. So you never know...."
Moving on from Casey was the correct thing to do, even if the "mover" didn't get much value. I know it's been beaten to death but the answer at first base is simple and his name is Adam Dunn. In the long run it would be better for Dunn as well. The idea of bringing Casey back, even at a minimal salary simply delays the obvious.