Shifty shift·y (shft) adj. shift·i·er, shift·i·est Distinguished by frequent changes in direction: shifty winds. Able to accomplish what is needed; resourceful. resourceful; fertile in expedients. evasive; crafty.
On his Twitter page, he even has 3JMcCollum listed near the very top. 3J is simple and gets the point across quickly. Like it.
Some day maybe we can call him McClutch. 3J is pretty good. If he lives up to it. A bit early for that.
Cool J? Fits his initials, his demeanor, and his shooting stroke. If it wasn't for that rapper fool, that's what I'd go with.