Very late in getting his center of mass moving forward. He lifts his knee, lowers it, leans toward 2B with head and spine, and reaches toward home with the front foot. And then he shifts his weight toward home.
The good news is very few 9yo’s are really good at using their lower half effectively. But I do suggest having him start working his way down that path. Try to get his butt (literally) moving forward sooner. Use the Herhiser drill to practice. He may not get really good at this until he’s a bit older but you can start pushing him in the right direction now.