One-Legged Wrestling Legend -- I'M UNRETIRING for Wrestling's Last Olympics

He's a living legend in collegiate wrestling -- becoming a freaking NCAA champ despite having just ONE LEG -- and now, he's coming out of retirement to train for the 2016 Olympics ... because it's the last chance he'll get at Olympic gold.

You'll recall, the IOC has eliminated wrestling from the Olympics following the 2016 games in Rio -- which means Rio will be the last Olympic games to feature the sport. (It's being replaced by field hockey. Seriously.)

Now, 24-year-old Anthony Robles -- who won the 2010-11 NCAA individual championship in the 125-pound weight class while at ASU -- tells TMZ, "If this is the last chance to be at that elite level, I want to represent my country and try and take home the gold."

He adds, "The Olympics is the highest level for wrestling ... There isn't a higher platform to reach for."

Robles unofficially retired from the mat 2 years ago .. and has since worked as a motivational speaker -- but he adds, "I never said I was retired completely."