I know this is a thread about Estrada, but would anyone have interest in J.A. Happ? It seems like he made a legitimate tweak to his game by throwing more cutters and less breaking balls which coincided with more strikes and a better K/BB ratio. Combine that with his poor first half, and relatively mediocre career up to the Pirates trade, and it seems reasonable to assume that he could be had on a shorter term deal to prove his worth.