Kimbo Slice has reportedly died after being admitted to a Florida hospital for an apparent heart attack. He was 42:

CORAL SPRINGS, Fla. – Kimbo Slice, a mixed martial arts fighter, died in a Coral Spring hospital Monday, sources have confirmed with Local 10 News.

Kimbo, whose real name was Kevin Ferguson, had a heart attack, sources said, and had been living with an enlarged heart.

Slice rose to fame as a street-fighting star on YouTube and later transitioned to the professional MMA ranks:

Here’s a video from Slice’s early days:

And from his later days while fighting professionally: