Some wicket-keepers have the skills of a specialist batter and have been referred to as all-rounders, but the term wicket-keeper-batter is more commonly applied to them,[citation needed] even if they are substitute wicket keepers who also bowl.
The generally accepted criterion is that a "genuine allrounder" is someone whose batting or bowling skills, considered alone, would be good enough to win them a place in the team.
For example, West Indies pace bowler Malcolm Marshall achieved ten scores of 50 or above in 107 Test innings between 1978 and 1991, but had a batting average of less than 19.
Equally, a specialist batter may be termed a "useful change bowler" and a good example of this is Australian Allan Border, who in a Test match against the West Indies in Sydney in January 1989 took 11 wickets for 96 runs (7/46 in the first innings and 4/50 in the second) as the conditions suited his occasionally used left-arm spin.
[5] However, some other players have achieved such a differential over significant parts of their careers, such as Imran Khan who across 54 Test matches during the 1980s averaged 44 with the bat and 19 with the ball.
[6] Wally Hammond and Doug Walters managed differences of 20.7 and 19.2, respectively, between their batting and bowling averages, however, they were generally regarded as occasional bowlers who could break partnerships rather than genuine all-rounders.