A battered roster, a busy deadline, and a championship contender trying to keep its historic pace. The Pittsburgh Pirates entered the third quarter of the season chasing history, but for the first time all year, the roster started to show some cracks. Injuries forced Pittsburgh to lean heavily on its depth, while the front office had to decide how aggressive to be with October approaching. The record still says this is one of baseball’s best teams, but the last 41 games may h