One of the clearest storylines hanging over the Pittsburgh Pirates in 2026 has been Paul Skenes’ slide. What had looked like a Cy Young-level season has turned into something far more uneasy, with fans starting to wonder what’s gone wrong as his fastball loses some of its usual pop and his overall production slips.
Dan Plesac, the three-time All-Star pitcher now on MLB Network, pointed straight at the mechanics. In his breakdown, he said Skenes is getting too quick and drifting into a more rotational move rather than staying up and down.
"At times he gets oftly quick; he gets more rotational this way (left) as opposed to up and down. And what happens why he's struggling with the arm side; if you rotate and that hip and your shoulder start to come this way, the arm starts to drag behind," Plesac said.
Plesac’s explanation makes the issue look pretty plain: Skenes is opening up early, turning too far to his left as he delivers the ball. That leaves his arm lagging behind the rest of his body, which makes it harder to stay synced up and repeat the kind of motion that produced his usual velocity.
That’s where the fastball trouble comes in. If a pitcher is trying to generate power from a position like that, the margin for error shrinks fast. Plesac’s point was that Skenes isn’t lining up his body and arm the way he should right now.
"He's throwing away from where he's going," Plesac said. "It's such an easy thing to fix, it's so minor, that if you just stay a touch longer closed instead of flying open early... and that way it'll be easier for him to keep it on line, getting that ball in to a righty and away to a lefty."
For the Pirates, that makes the problem sound fixable rather than permanent. Getting Skenes to stay a little more closed and stop flying open early could help him get back on line and regain some of the command that’s been missing. The source of the issues appears tied directly to that mechanical shift, which has gone hand in hand with a drop in velocity and a bit more wildness.
Whether that change can be cleaned up in time to matter for a postseason push or a Cy Young race is another question. But the bigger point is clear: Skenes still has the talent, yet his recent run hasn’t been good enough, and Plesac believes the answer starts with tightening up the delivery.
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