Age is often just a number. Few exemplify this better than William Mitchell, a 78-year-old black belt with an extraordinary life story that spans from Vietnam to the highest ranks of federal law enforcement to the mats of BJJ academies across the globe.
Mitchell, who received his black belt just six months ago after a 13.5-year journey in the art, credits his lifelong commitment to physical fitness—particularly running—with not only enhancing his quality of life but literally saving it.
“I’m convinced that running saved my life,” Mitchell says, recounting a heart attack he suffered during a triathlon on Chokes and more podcast. When doctors examined him, they were astonished by what they found. “I had two 100% blockages, and I was passing a blood clot through the third major artery. The doctor said, ‘I have no idea why you’re still alive.'”
The answer, it turned out, was in his heart’s adaptation to decades of endurance training.
“When they went inside and looked, he said, ‘I’ve never seen so many ancillary capillaries in someone’s heart,'” Mitchell explains.
Years of running had forced his body to develop small capillaries to compensate for his increasingly blocked arteries.
Mitchell’s journey to BJJ began unusually late.
“I was very young when I started. I was 64 years old,”
he jokes. Before stepping onto the mats, he had already lived several lifetimes worth of experiences.
After serving in Vietnam in 1970-71, Mitchell joined the Bureau, which later became the DEA. He would spend 27 years with the agency, working in locations including New York, Mexico, Puerto Rico, Egypt, San Francisco, and Miami.
His career put him at the center of some of the most significant DEA operations of the era. In Puerto Rico, he witnessed the massive influx of cocaine during the height of the Pablo Escobar era.
“People didn’t realize the amount of cocaine that Pablo Escobar was dropping in the waters outside of Puerto Rico,” he recalls. “We’re talking about loads of two tons at a time.”
Mitchell also had connections to one of the DEA’s darkest chapters—the kidnapping, torture, and murder of Agent Enrique ‘Kiki’ Camarena in Mexico. Mitchell had been working on a case targeting kingpin Miguel Ángel Félix Gallardo before threats to his safety forced the DEA to pull him out of Guadalajara. Camarena later picked up the case.
“He suffered greatly for it,” Mitchell says solemnly.
After retiring from the DEA and later from his private security consulting business, Mitchell found himself drawn to martial arts—something he had practiced in his youth. Despite having a defibrillator in his chest and titanium rods in his back, he walked into a Gracie University affiliate in Destin, Florida, and asked if he could train.
“I said, ‘Listen, I’ve had some issues in the past. I have this defibrillator put in my chest. I have titanium rods in my back, but I used to be a martial artist, and I’d like to be a martial artist again,'” Mitchell recounts. “And he said, ‘Welcome.’ A lot of guys would have said, ‘No thanks. I want nothing to do with you.’ But he said, ‘Welcome.'”
That moment began what would become a 13.5-year journey (and counting) in Brazilian Jiu-Jitsu, taking him from Florida to Barcelona, Spain, where he now lives and trains at Roger Gracie Academy in Malaga.
Mitchell describes his approach to the sport as “old man jiu-jitsu”—a defensive style focused on self-protection rather than competition points or flashy moves.
“First of all, my jiu-jitsu is defensive. I play defensive jiu-jitsu,” he explains. “Some people might think that’s not a good idea. You’ll never win a tournament. I don’t care. I’m not trying to win tournaments.”
This philosophy extends to how he trains. Mitchell emphasizes flow rolling—a cooperative form of sparring that focuses on movement rather than resistance or submission hunting.
“To me, the best way to learn jiu-jitsu is to flow jiu-jitsu,” he says. “Try to flow when you’re training, when you’re rolling. Because if you’re flowing into a movement… you learn it because you’re doing it.”
Beyond jiu-jitsu, Mitchell maintains a rigorous fitness regimen that includes running, swimming, and cycling. Even at 78, he supplements his BJJ training with additional cardio because his heart rate monitor tells him
“jiu-jitsu training doesn’t elevate my heart rate enough.”
After health scares including a heart attack and an episode of tachycardia in 2010, Mitchell completely overhauled his diet. A former self-described “carnivore” who
“used to eat meat all the time,”
he went vegan for a year and a half before gradually reintroducing some animal products.
Today, his diet consists primarily of vegetables, chicken, turkey, and protein shakes. He avoids red meat entirely and takes a regimen of supplements including krill oil, multivitamins, creatine, collagen, riboflavin, vitamin B, and L-carnitine.
His one indulgence? A weekly vegetarian pizza—though he’s adamant about one thing:
“What about pineapple on a pizza? Never.”
At 78, William Mitchell continues to roll with practitioners half his age or younger. His disciplined approach to health, nutrition, and training serves as inspiration for BJJ practitioners of all ages.
As he reflects on his extraordinary journey from federal agent to black belt, it’s clear that the same determination that carried him through decades in law enforcement now fuels his passion for jiu-jitsu.
“Do I have any PTSD from Vietnam? No, I don’t,” he says matter-of-factly, embodying the resilience that has defined his life. “Vietnam was just part of my life. Made me a better person.”
That same resilience continues to serve him well on the mats, where this 78-year-old black belt shows no signs of slowing down—proving that in both jiu-jitsu and life, age truly is just a number.
