And he is only 14? I think teenage boys really shoot up starting at 16 or 17. Their last years as teens, they really put on a lot of height. I remember not seeing my cousin over the summer; and, I was amazed at how tall he had gotten over the past 2-3 months of summer vacation.
I shot up from 5’6” to 6’1” when I was 14. 43 years later still 6’1”