What, you haven't heard of Grizzly Bear Tennis?
It's awesome. You know regular tennis, right? With the yellow ball, the rackets, the court and net? Well you take that, and then you grow a beard. That's Grizzly Bear Tennis…
… and it looks like Liev Schrieber has mastered it!
Need proof? There's plenty below!
[Image via Ramey Pix.]