Projectable means that he has a chance to have a pro body.
This also depends on his position. A prime pitchers body at the Major League level is between 6'1 and 6'6 and between 185-235lbs of "good weight". Some organizations will draft high within those guidelines and some won't.
The average MLB height and weight for any position is 6'1/195lbs.
Your son should look to weigh about 180-205 of good weight by senior year of h.s to have a "pro body" and "meet the projection".
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