Seth Hernandez is wasting no time making noise in the Pittsburgh Pirates farm system. After dominating in Low-A with eye-opening strikeout numbers, an ERA under one, and three secondary pitches producing massive whiff rates, Hernandez has already earned a promotion to High-A Greensboro.

On today’s OffBeat, Alex Stumpf breaks down why Hernandez’s stuff has been so overwhelming, what makes his fastball-changeup-slider-curveball mix so advanced, and why Greensboro could be the next real test in his development. He also looks at whether Hernandez could follow a Konnor Griffin-style rise through the system and potentially reach Altoona before the end of the year.

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