The wrestling world mourns the death of Sabu, a former ECW champion and pro wrestling legend, who died Sunday at age 60.

Sabu, a "hardcore" professional wresting legend whose real name was Terry Brunk, has died at 60 years old, the WWE announced.

Sabu, one of the most popular hardcore wrestlers during his run with ECW in the 1990s before a brief run with WWE in the mid-2000s, has died, according to PWInsider.com. He was 60. A cause of death was not disclosed. Sabu, real name Terry Brunk, had his retirement match against Joey Janela last month.