Kimbo Slice passed away on Monday (June 6), after being hospitalized. He was just 42 years old.

As stunned fans and peers continue to express their shock, we take a look back on his career with a short clip showcasing some of Kimbo’s career highlights, inside both the cage and the boxing ring.

Slice rose to fame on the Internet, as videos of his backyard brawls racked up millions of views on Youtube. He eventually attempted to go mainstream and fight professionally as a mixed martial arts fighter, beginning with a stint with now-defunct promotion EliteXC, where he served as its star… up until unknown fighter Seth Petruzelli knocked him out in 14 seconds on Oct. 4, 2008.