The leaves are changing colors and the air has a certain crisp to it. Playoff baseball competes with regular season football. It’s Brocktober baby! Let’s learn a little more about the guy who has a whole month named after him: UFC Heavyweight Champion Brock Lesnar.

The end of the year is the perfect time to celebrate America’s pastime: watching people get their heads smashed in. The UFC definitely brought it this year with some awesome face restructuring performances. Here are the five most brutal knockouts of 2009.

Randy Couture couldn’t beat Brock Lesnar. Heath Herring couldn’t beat Brock Lesnar. Frank Mir couldn’t beat him a second time. So, who among the MMA heavyweights can bring down the UFC phenom? Here are five fighters I think stand a good chance against Brock Lesnar’s brutal beatings.