To Ball = To play basket ball (and only this sport) He is better than the average player (dude) or person at the sport. The writer is not sure if he is a little better or much. The writer may want your input or may be about to write a paragraph that answers the question. Though the statement seems to be giving prays, it is comparing the player with all dudes. I am a dude. It should say (dudes in the game -or in the biz.) It is an insult to compare a player with everyone in a way that includes me.

Perhaps it just means basketball. I googled it and found a video.(www.refinedhype.com/hyped/entry/j-cole-can-ball/)