Pico's devastating one-punch knockout

Aaron Pico has earned his first pro MMA victory with an incredible left hook on Justin Linn at Bellator 183.

After losing his debut fight in just 24 seconds, the powerful victory was retribution for the 21-year-old.

Lin was out before he hit the ground in the first round, such was the power of Pico's quick, sharp left hand.

Watch the incredible punch in the video at the top of the page.