If one measures the standard deviations that a sportsman is above the mean for their sport, there is an argument that Sir Donald Bradman is the greatest of all time. He certainly ranks as the greatest cricketer of them all.
Legend has it that Sir Donald developed his phenomenal eye by throwing a golf ball at a water tank and hitting the rebounds with a wicket.
Bradman's batting average was so high (99.94) that even the greatest batsman of this century, Sachin Tendulkar, can only manage an average slightly higher than half of this.
