Initially my thoughts were SF mainly cause of the poor SB and also i have been training OS so far and he has already popped in JR. Also guard training lends itself more to the rest of my team as my current big men are already in there 20's and have less potential.
Also he is already in my starting line up as a SF and im a fair way off it in the league anyway at best i might get 5th in my conference.
My only real problem is the order of upgrading skills/ what to train.