They do not want him because for one they do not have the money and for two they know how to scout white sox on the other hand do not. They have players that can take over third for them next year for next to nothing.
Carlos Lee .367
Aaron Rowand .367
Paul Konerko .358
Willie Harris .346 barely better than koskie.
Carl Everett 323
Juan Uribe .318
Joe Crede .295
Jose Valentin .290
Koskie's obp this year is .343 which is a bad year for him. His career obp is .373 better than any player on the white sox that is not named frank thomas.
He is a nice fit for the cell being a ground ball type pitcher. I think he will be one of the sleepers in free agency. But i would not rely on him as are third starter fourth at best.