3 players come to mind: Jason Bay, Miguel Cabrera and Adam Dunn. I don't think PGH or FLA would trade Bay or Cabrera, but I believe CIN would trade Dunn for Zambrano. Given the choice between impact hitters of a similar age, or Z, I'd keep Z. Dominant pitching is just too hard to come by. So you wouldn't trade Z for Dunn and Burnett?