The Pirates called up their top hitting prospect, Austin Meadows, in mid-May. They've seen him put up a .343/.370/.588 line in 108 plate appearances so far. That's exactly the type of production you would want to see from a rookie, and it's that type of production that can boost an offense.
The problem is that the Pirates' offense has been anything but boosted. The team has a .232/.298/.369 line in the last month. Their offense ranks last in the NL and 27th in MLB during that span.
Obviously this isn't on Meadows. He's one of few players who is performing during this stretch, and the poor results from the rest of the team really highlight how disappointing it is that a Rookie of the Year campaign is being wasted.