He is just starting to have that body to big for the legs look. which makes him 3.5 to 4.5 years. When they look to big for the legs and look front heavy they are 5.5 to 6.5 the rack is out of my league but 140s seems about right. When he has his full fall weight, if he looks real body to big for his legs & like top heavy I would lean to the 4.5 years.