Ken Brett has died at the age of 55. He was the older brother of George Brett and finished his career with his brother as a relief pitcher for the Royals in 1980 and 1981. Brett began his career in 1967 and became the youngest person to pitch in a World Series game when he took the mound for the Red Sox at the age of 19-years and one month. Brett pitched for ten teams in his 14-year career. He was battling brain cancer.