I’ve got some recent video from a few different angles of my son, who is a 2020 LHP that recently turned 15. I am hoping to get some feedback regarding his mechanics. Presently, his pitching coach is working to return him to his natural arm slot, 3/4, and get his elbow away from his body and hand away from his head while pitching (hence the L-screen shown in the first two videos). The last is a video taken during warmups before a game this past Saturday.
Pitching Practice 1;
Pitching Practice 2: