Bill "Superfoot" Wallace

According to Wikipedia:

Wallace was born in Portland, Indiana, and trained in wrestling during his high school years.[1] He began his study of Judo in 1966 and was forced to discontinue his Judo related activities because of an injury he suffered to his right knee during practice.[1] He then began to study Shōrin-ryū Karate under Michael Gneck[2] in February 1967 while serving in the U.S. Air Force. After entering the point fighting tournament scene and achieving success there, he switched to full-contact competition.

With the coaching help of veteran fighter Jim 'Ronin' Harrison, Wallace won 23 consecutive professional fights between 1974 and 1980,[3] becoming the Professional Karate Association middleweight world full-contact karate champion and retiring undefeated.[2][4] He was known for his fast left leg kicks,[5] especially his roundhouse kick and his hook kick, which was clocked at about 60 mph.[4] He focused on his left leg because of the Judo-related injury to his right knee, using the right leg primarily as a base. He also suffered the loss of one testicle during a point fighting tournament, when his protective cup was struck at an unfortunate angle.[6]

A year later, Wallace turned professional and captured the PKA middleweight karate championship with a second-round knockout. He relinquished the crown in 1980, undefeated. The PKA promoted the sport of full-contact karate. Full-contact karate differed from kickboxing in that leg kicks were allowed in kickboxing and forbidden in full-contact karate. It was PKA President, Don Quine, who coined the phrase "Superfoot" to describe Wallace after witnessing his fight first with Mark Georgantas and then with Jem Echollas.[7]

In 1990 Bill Wallace (166 lbs) fought one last exhibition kickboxing/karate match with friend Joe Lewis (198 lbs) on pay per view. Both Wallace and Lewis were refused a boxing license because of their age. The exhibition ended with one judge in favor of Wallace and the other two judges scored the bout a tie; ending the exhibition in a draw.[8]