QUOTE (Deesign For Life @ Jun 15 2008, 21:54)

something to do with his age! porter was totally free because he is older.
"There was controversy surrounding the player when, in June 2007, Scottish team
Dundee United offered Porter a contract. This angered Oldham, as under
FIFA directives they would be entitled to a transfer fee as long as the player does not move abroad, as the player is under 24 years old. However, a transfer to Scotland would be regarded as a "cross-border transfer" by FIFA and no fee would be payable. Dundee United chairman
Eddie Thompson pointed out that his club has breached no rules in doing this, and were acting in a proper manner. On
27 June 2007 Dundee United announced they would not be signing Porter as he had turned down the move"
This was from his wikipedia page.