World Wrestling DEADeration

The shocking and gruesome double murder/suicide involving wrestling superstar Chris Benoit isn't the "sport's" first brush with mysterious and untimely deaths.
Dead Wrestlers gallery: Click to launch photos
From exploding hearts to drug use -- and even to some unsolved cases -- some of the musclebound who've entered the squared circle have checked out early.

TMZ has assembled a gallery of the dudes and chicks -- knocked out too soon.