Not entirely sure whether to take this thread seriously or not.

Jeet Kune Do is self defence. Watch a Vunak vid and its very much around biting, gouging, groin strikes and using economy of motion to attack the most vulnerable target with the most direct tool.

Thats not MMA.

In answer to the original question, well, we will never know how Lee would have fared in the sport as it stands today. If he would have been plucked straight out of 1971 and put into the octagon against a top MMAist today then 'one inch punch' or not...he's getting soundly beaten. However with his attributes and if he trained in the sport of MMA and adapted some of his stuff he could no doubt have been a great contender.

One of those things...we will never know.

Lee developed the Jeet Kune Do system for self defence. Not as a sport.