My son Alex is a RHP, 12 years old, pitching in Majors division. He's pretty tall for his age and consistently throws north of 60 MPH (from what I'm told). About a month ago, he threw a complete game shutout with 10Ks and 2 walks. However, in his last two games, he's been issued many more walks, and even he says that he is consistently throwing low and outside (to right handed hitters), even when he wants to throw down the middle for a strike.
To complicate matters, about 2 weeks ago, he got a new glove, a Rawlings Gold Glove Gamer 12", which he says is noticeably heavier than his old glove.
I've taken freeze frames of videos of him pitching, and it seems like in the past month, his left (glove hand) has moved about 6 inches lower at heelstrike (perhaps due to the new, heavier glove?), which I'm thinking is causing him to open up to home plate earlier. But I never played baseball as a kid, so I'm just guessing.
Here's a video of an unintentional outside and low pitch -- 2nd pitch of the game, already down 1 ball, no strikes. (All the other low and outside balls look identical to the untrained eye.)
Any thoughts would be much appreciated!