The ex-Duke superstar is obviously a one-of-a-kind freak athlete on the hardwood and he's shown he can throw a football into outer space ... but Z-Dub hit an L.A. golf course on Tuesday and shanked up a storm.

Look, he's definitely no John Daly ... but we gotta note that we have no idea how much he was trying or if he even cared to give it a good attempt.

So, next time you get down on yourself 'cause you can't dunk like Zion, just remember you're probably a better golfer than him.

As we previously reported, Williamson has been training in L.A. -- while wearing Nikes -- leading up to this month's draft ... enjoying his time on the west coast before he inevitably ends up in New Orleans.