The legendary "Judo" Gene Lebell -- possibly the most badass man to ever walk the earth -- has died at the age of 89, and some of the biggest sports stars in the world are showing love in light of his passing.
LeBell passed away Tuesday ... leaving behind an incomparable legacy in mixed martial arts and wrestling.
Nicknamed the "Godfather of Grappling," LeBell's journey to stardom began when he won the heavyweight and overall Amateur Athletic Union National Judo Championships in 1954 and 1955.
LeBell is widely credited with introducing catch wrestling and grappling techniques to pro wrestling and MMA.