Tigers and A-Rod?

This is a kind of a non-story, but I feel like writing about it anyway.  Lynn Henning of the Detroit News speculates that the Tigers could have interest in signing Alex Rodriguez should he become a free agent after the 2007 season.

The speculation is based on shortstop Carlos Guillen’s impending free agency.  Henning doesn’t think the Tigers will offer Guillen a contract longer than three years, and that the length could be a dealbreaker.  Additionally, the Tigers have a positive relationship with Scott Boras.  Finally, Henning notes that the Tigers were believed to have acquired about Rodriguez’s availability last July.

There seems to be an assumption that Rodriguez would serve as the shortstop for the 2008 Tigers, since Brandon Inge is under contract through 2010.  To me that seems a questionable assumption.  When was the last time a star player moved in the opposite direction on the defensive spectrum after the age of 30?  (Not a sarcastic question, I’m really curious).  And no, Darin Erstad moving from first back to center doesn’t count.