Keith Alan "KB" Brantly (born May 23, 1962) is an American former professional long-distance runner who contended in the men's marathon at the 1996 Summer Olympic Games in Atlanta, Georgia.
Brantly finished twenty-eighth of one hundred and eleven runners who completed the race, in a time of 2:18:17.
He is recognized for his extensive distance-running career that encompasses nearly three decades at distances that range from one mile to a marathon.
He graduated from the University of Florida with a bachelor's degree in exercise and sports science in 1986, and was later inducted into the University of Florida Athletic Hall of Fame as a "Gator Great."