Pretty sure I see a glove pull which usually leads to early shoulder rotation. And that will prevent maximum hip and shoulder rotation (which robs velocity), prevents you from getting out over the front foot, and can cause the arm to have to play catch-up leading to front side elbow pain.
When you extend your throwing arm back and your glove arm forward into your "opposite & equal" position, the glove should not subsequently come back from the further forward position it achieves (well, at least not before ball release). Instead, it should turn over and stabilize somewhere over the front foot while the body tracks towards it. This should allow you to delay your shoulder rotation and all of the bad things that go with it.
Given your age and how engrained this movement pattern probably is, this may be a hard habit for you to change. But it's still worth trying due to the ramifications for both performance and health.