This is the position in a swing called bat lag. Hands and knob inside the path of the pitch before you release the barrel to the ball.
One of a pro and one of my daughter
Some so called hitting experts think the hand and arm do not stack over top the elbow in a swing. I beg to differ.
Its more in my daughters swing because of pitch location.
In Casey's bat lag her upper body is abit ahead of her lower. Her hips should be open more and her back foot of the ground some.
She still hit this hard but would have been harder with her hips more involved.
I like how she kept her head down through the swing
At a Crystal / Howard clinic they teach front elbow/knob/release barrel to ball. If you do it right your body will be in this Position just before releasing to impact.
Straightleg