A sports dynasty is a team or individual that dominates their sport or league for an extended length of time. The definition of dynasty by some academics implies a single leader over the bulk of that period. The designation should not automatically be used for a string of several dominant years in a row, unless the number of years that the league has existed is few, making several years of dominance a large percentage. It implies an extended length of time being at the minimum half a decade to a decade and beyond. Sometimes such dominance is often only realized in retrospect.