Thome Traded to White Sox

Does this mean the White Sox are worried about their ability to re-sign Paul Kornerko? Jim Thome has been traded to Chicago along with 22 million dollars and the Phillies get center fielder Aaron Rowand a minor league player and one to be named later. If Thome is back to his old self after his surgery last year then Chicago has just added a huge bat to their squad. Jim Thome