DH 44 - you have show good intelligence in your posts....Think about what you just posted:
A) Because the level of competition at pro level well above that of collegiate level so you have to be 'fit for fight' as some say - at the top of your game physically and mentally.
b) Because pro season much longer than collegiate season.
C) because almost year round training schedule in pros places greater physical demands on body.......................
Just to add one more.. Age and longevity has to play a role in the decision making of drafting this kid... Things will only get tougher as he gets older..