MMA Fighter Kimbo Slice Dies at 42

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Boxer and mixed martial artist Kevin Ferguson, better known to fans as Kimbo Slice, died at the age of 42 on Monday, ET can confirm.

A family source confirmed to ET that the Bahamian-born fighter died of heart failure.

Slice, who got his start in street fighting, fought for Elite XC, UFC, and Bellator MMA throughout his 9-year career, which also included stints in boxing and professional wrestling.

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Scott Coker, president of Bellator MMA, also confirmed Slice's death in a statement saying, "We are all shocked and saddened by the devastating and untimely loss of Kimbo Slice, a beloved member of the Bellator family. One of the most popular MMA fighters ever, Kimbo was a charismatic, larger-than-life personality that transcended the sport."

"Outside of the cage he was a friendly, gentle giant and a devoted family man," Coker added. "His loss leaves us all with extremely heavy hearts, and our thoughts and prayers are with the entire Ferguson family and all of Kimbo's friends, fans, and teammates."

More details to come.