 Allen's greatest bowling performance was in his third Minor County match, against Warwickshire Second XI taking seven wickets for 53 runs.This was not enough to win the match, as Durham were unable to match Warwickshire's 223, losing the match by an innings and 23 runs.Allen was a regular in the side from 1965–1968 and made his sole List A appearance in 1968, playing in the first round of the Gillette Cup, scoring two runs before being bowled out by seven-time Test cricketer Len Coldwell, in his penultimate year before retiring from first-class cricket.