That's just wrong, you can read it everywhere.
Carlos Alberto was bought to strenghten the midfield, and Baumann will probably be the victim of this transfer.
Bremen 2007/2008 (probably):
------------Rosenberg------
Klose replacement--------
-----------------------------------------------------------
-------------------------Diego---------------------------
-----------Borowski--------------Carlos Alberto----------
-------------------------Frings---------------------------
-----------------------------------------------------------
--Womé-------Naldo----------Mertesacker--------Fritz---
------------------------Wiese-------------------------------
That's how it will be, Carlos Alberto is meant to be
Diego's partner in midfield.