Sorry, I don't follow. If what you're talking about is trading for "proven" talent that is 'MLB ready' or established, that's exactly what Melvin has done in his tenure here, rather than trading for unproven, highly-ranked prospects. Yeah, there have been some trades for the likes of Capellan or de la Rosa (who also were in the upper levels of the minors and made their MLB debuts quickly) but far more have been for younger, MLB ready assets like Segura, Capuano, Gomez, etc when he's traded a proven commodity.