Hi my son just turned 14 and has been pitching lights out for his JV team as an 8th grader. I am trying to get him to end with his back leg coming forward not off towards the first base line. Is he losing velocity because of this? Am I over thinking on this matter? Attached is a video of 3 pitches from a bullpen. First pitch is a 65 mph curve, the second is a 70 mph change-up and the third is a 82 mph fastball.