The short answer is yes!
The Pirates started May with a seven-game losing streak. After that, they won 7 out of 16 games. FanGraphs projects them to win 71 games this season.
The Pirates’ batters have the least power in the Majors. For the season in games thru 10 May, their ISO and SLG ranked 29th in the Majors. More recently, those stats were worse. In games thru 20 May, their .102 ISO and .328 SLG ranked 30th in the Majors.
On the other side of the equation, the Diamondbacks are due to break out of their losing streak.