James Taylor (England, at 26 years)
Surprising the cricket world, James Taylor announced his retirement from cricket at the age of just 26-year-old due to his critical heart condition. He was suffering from a rare disease ARVC (Arrhythmogenic Right Ventricular Cardiomyopathy), which always bring a risk of sudden cardiac arrest that can lead to death. He played 27 ODIs and seven Test matches for England. He was a talented cricketer but the disease destroyed his cricket career at the very early stage. In May 2015, he also led the England team in the Ireland tour.