Does anyone know how many locker fragments we will need to get lockers (I assume that’s what they are for)

Trying to do the CPU graduation event for them, tough going for a noob when every CPU player is 99 and every stat on every one of their players is 99 including QB, O LINE, D LINE ETC ETC 

Just trying to see if the grind will be worth it.  Currently 3-1 (Lost 7-6 after cpu blocked 2 x FGs)