As Talking Chop notes, today is the six-year anniversary of the Pirates' trade of Nate McLouth for Charlie Morton, Jeff Locke and Gorkys Hernandez. With Morton and Locke still in the Bucs' rotation, the trade is still bearing fruit for the Bucs. The quality of that fruit has been questionable at times, but the McLouth deal turned out to be one of the more successful of Neal Huntington's rebuilding trades.
McLouth didn't accomplish much in Atlanta, finishing his career there with just 0.1 fWAR. That was probably partially incidental -- McLouth returned to Pittsburgh in 2012 and flamed out there, too, but he had a strong comeback season with the Orioles in 2013, so it's easy to imagine that his seasons in Atlanta could have gone better.