With 40 games left, the Pirates need young arms to carry the load as their rotation struggles. Wilber Dotel, despite a high ERA, has flashed elite stuff and shutouts. Khristian Curtis, who debuted with five scoreless innings, is back and firing in Triple-A. Hunter Barco, a lefty prospect, is heating up in the minors. And Antwone Kelly, once shaky, is now dominating Triple-A with a stellar ERA. All four could be key bullpen or rotation reinforcements down the stretch.

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