Well, my 2022 rhp PO has been pitching for 5 years now. Mechanically: Good downhill momentum, scap load, hip to shoulder separation, 90° at foot plant, arm spirals nicely into low 3/4 arm path into ball release. Move quick but velocity is well below average.
People watching saying looks like he’s throwing harder than he is. Been through various pitching coaches and have never been able to see an uptick in velocity last three years.
Yesterday while watching video in super slow motion noticed he’s gripping a 4 seam fastball awkwardly (same as in photo). No one has ever noticed this before.
Handed him a ball and showed him where to properly place his thumb. Says it felt very weird. I said, that’s good, I think we found your problem.
Going to ingrain thumb placement in him over a few days with catch play then get him on the mound.
Let you know how it goes...