Maybe he's had to much to soon, very difficult to compete when your not physically up to it. the lads still growing things are changing for him. You sound like your doing the right things for him, only thing I would say is don't push to hard. As a junior organiser I saw young lads make great strides with their game then come to a standstill for a while many times that's what they do. Good Luck.
10/7/14 at 9:23am