Mike Tyson is a true one of one. He was the first and only 20-year old heavyweight champ, was once the highest-paid athlete in the world, and his devastatingly quick KOs made you question if purchasing the fight on pay-per-view was worth it.

Like many other retired fighters, Tyson has recently caught the boxing bug again and appears to have reignited his passion for the sport at the age of 53. Yes, he may be old enough to get an AARP card, but after looking at his Instagram, it’s obvious he still has some gas left in the tank.

What separated Tyson amongst his piers outside of his ferocious punching power and larger than life persona was his muscle-bound hulking physique. His bulging biceps and assertive shoulders definitely played a part in his dominance both before and during the fight. Here, we’ve wrangled together the most impressive photos of his physique.