The dude's 15, he could pack on 20 lbs by next year just due to growth.
I went from 5'6 165lbs at age 11 to 6'0 184 lbs by age 12. By the time I was 16 I was 6'4 230ish. He has a good base. A little positive re-inforcement would be nice here guys. If Killian "has a good base" which I recall him hearing from several people, than this guy is Dorian Yates jr. (no offence Killian)