The Cubs just traded Scott Williamson to the Padres for a couple of minor league arms, and the widespread speculation is that this move is only the precursor to the Padres moving a reliever (Linebrink anyone?) for a 3B.
Checking the boxscore in Charlotte, Josh Fields is not in the line-up.
Is there a trade about to be announced? I don't know, but it sure makes for interesting discussion.