Batting average (cricket) are usually subject to a minimum qualification of 20 innings played or completed, in order to exclude batsmen who have not played enough games for their skill to be reliably assessed. Under this qualification, the highest Test batting average belongs to Australia's Sir Donald Bradman, with 99.94. Given that a career batting average over 50 is exceptional, and that only five other players have averages over 60, this is an outstanding statistic. The fact that Bradman's average is so far above that of "any" other cricketer has led several statisticians to argue that, statistically at least, he was the greatest
Batting average (cricket) strongly affected by the number of not outs. For example, Phil Tufnell, who was noted for his poor batting, has an apparently respectable ODI average of 15 (from 20 games), despite a highest score of only 5 not out, as he scored an overall total of 15 runs from 10 innings, but was out only once. A batter who has not been dismissed in any of the innings over which their average is being calculated does not have a batting average, as dividing by zero does not give a result. Highest career batting averages in Test matches as follows: Source: