Esmerlyn Valdez and Tyler Callihan are giving the Pirates real production at exactly the right time. With Spencer Horwitz and Oneil Cruz sidelined, Alex Stumpf explains what has stood out about both young hitters, why their power is worth taking seriously and how much better Pittsburgh’s depth looks than it did a year ago. Ryan O’Hearn also delivered a huge two-homer game as the Pirates avoided a costly sweep.

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