The three guys above (Tim Hudson, Brian McCann, and Chipper Jones) aren't going anywhere anytime soon.
When Hudson returns, whether it be in August or September, the Braves will get their ace returning to a rotation that already has proven to be pretty good in slots one through four.
The Braves position players have been underperforming, and the bullpen has been a bit shaky at times. So here's a possible list of who the Braves might, or should, try to acquire in a trade.
Also - take a peek at my list of 10 guys the Braves should never consider trading.