I wonder what is the biggest growth spurt in history a player has had after being drafted . The biggest I can think of are the likes of Joey Kennedy started at the hawks at 185 cm but was 189 at the swans .A guy I went to high school with would’ve been similar height to Watson at the end of year 12. Saw him a couple years later at the supermarket and he would’ve been about 6’2”. So it’s possible.