its not a guarentee that he will pop, but 1 position is faster to pop then 2 position. To train OD for a 18yo it might take 2 weeks 1 position for 1 pop. 2 position it might take 3-4 weeks for one pop. (not saying this is how long it takes to pop). 2 position can train up to 6 players while 1 position up to 3 if u want full training. i will look at your roster than tell you what i think you should do, 1 or 2 position.