Reading the 2008 season "expose" Tiger Confidential by Andy Van Slyke is instructive in the effects of suddenly adding players without regard to chemistry. Gary Sheffield always seemed to be annoyed to be there. Dontrelle Willis had his anxiety issues. Miggy may well have not been focused due to demon rum.
I hope the Ryan Garko signing which points to an understanding of psychology in team-building portends better results for our sudden influx of new and expensive talent.