Krzyzewski: 'I do not color my hair' Following his team's 93-81 victory against North Carolina last night, Duke head coach Mike Krzyzewski addressed health concerns and his trip to the hospital after Duke's loss to Wake Forest. Krzyzewski said that doctors told him he had the brain and heart of a 20-year-old, something the Hall of Fame coach found unsettling. When asked if he had the hair of a 30-year-old as well, the 67-year-old head coach revealed that he does not, in fact, use any performance-enhancing products on his jet-black hair.“I will tell you this: I do not color my hair. I do not," Krzyzewski said with a smile. "I’m losing my hair, but I do not color my hair. I don’t. So, it’s a myth. My buddies would kill me if I did.” There you have it, folks. One of life's greatest mysteries is finally solved.