then please explain where we play kearns/dunn/griffey/pena at the same time?
Easy. You trade Casey at his current high point for value and move either Dunn or Griffey to first base.
What you don't do is move Kearns to 3B. I wholeheartedly agree with Aronchis on this and always have.
If Kearns is placed at 3B on opening day, get ready for another loooooooong season. And I'm still waiting for more than an instance or two of players who've never played anything but OF professionally making anything more than a token move to the Hot Corner with anything more than horrible defensive results.
Let's put this in perspective...
To post a winning record in 2004, the Reds would have had to post a Run Differential of historic proportions- ie. an incredible feat that couldn't possibly been expected. And yet, folks claimed that it was possible. It wasn't and baseball history told us this.
The possibility of a successful Kearns-to-3B move is even more improbable than that. The game's history tells us that too. Yet folks refuse to listen.
Kearns to 3B is not comparable to Chipper Jones. It's not a Johnny Bench (who was absolutely horrible, BTW) situation. It's not Pujols, Rose, Biggio, or anyone else who's played a position where a move to 3B could be projected as a potential success. Hell, Pujols and Nevin were both moved off the hot corner due to their inability to defend the position. And we expect Kearns to be better than either? If Kearns is even as good (unlikely) as either player, then what does that say if other teams are moving these kind of defenders? C'mon, folks.
In short, it's just today's Reds Stupid Thing to Do. A competent GM would have nipped this one in the bud in short order- without even accomodating Kearn's request (if it was actually his request). O'Brien's only saving grace in this situation is if he's letting Kearns try his hand at it simply to allow Austin to prove himself wrong.