“Unleashing Potential: Can a Revitalized David Peterson Secure His Spot in the Mets’ Rotation?”
“We put some emphasis on continuing to improve my four-seam in terms of the vert [vertical movement] and create the separation with the sinker,” he said. “Being primarily a sinker guy growing up and in college, I use the four-seam a lot out of the zone for chase up.”
The location of Peterson’s four-seam fastball is crucial for its success because he only throws 93 mph. However, he gets elite 7.1 feet of extension on his release, so the ball is released closer to home plate than average, which can make it look faster. Like a lot of left-handers, Peterson’s fastball has some natural horizontal run, so it’s not a typical flat fastball that thrives up in the zone, but through three starts this season, Peterson has added over one inch of Induced Vertical Break (iVB) on his four-seam, which has given it a flatter approach angle. That means it fights against gravity a bit more as it approaches home plate and seems to “rise” a bit more than it had previously. A fastball like that tends to thrive more up in the zone, which is what Peterson wants.
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