Jabari Parker Jumps Too High, Hits Head on Rim

Heads up, Jabari Parker!

The Milwaukee Bucks forward isn't renowned for his athleticism, but Parker showed off some serious hops against the visiting Dallas Mavericks on Saturday.

In fact, he might've showed off a little too much, as he hit his head on the rim during a second-quarter dunk. 

Someone tell Parker that it's only preseason and not to hurt himself. The last thing the Bucks need is Parker out with a concussion.

[Vine]