An aggressive
middle-order batsman, Brun Smith played for Canterbury in the
Plunket Shield from 1946–47 to 1952–53. After scoring 106 out of a Canterbury total of 194 against Auckland in January 1947, he made his Test debut against England a few weeks later, scoring 18. He was not in the original selected team, but was included just before the match to replace the injured
Stewie Dempster. His highest first-class score was 153 for Canterbury against Otago in Christchurch in the 1948–49 season, when his 392 runs at 56.00 helped Canterbury to win the Plunket Shield. Smith toured
England in 1949, scoring 1008 runs at 28.00, and playing two Tests. In the First Test at Headingley he scored 96 in two hours in the first innings and 54 in the second. He made 23 in the Second Test, and was then replaced by
John Reid, who was making his Test debut, for the Third and Fourth Tests. Smith played in the First Test against the West Indies at Christchurch in 1951–52, top-scoring in the second innings with 37 despite a strained leg muscle. It was his last Test. For many years his Test average of 47.40 placed him third (after
Stewie Dempster and
Martin Donnelly) among New Zealanders with 200 or more Test runs. He succeeded
Walter Hadlee as captain of Canterbury during the 1951–52 season and led them to victory in the
Plunket Shield.
Dick Brittenden said, "Smith's batting was always violent, usually brilliant. Not that it was always a sound proposition." In 1952 ''
The Cricketer's'' New Zealand correspondent noted that, while the 1951-52 Plunket Shield season was characterized by an excess of cautious batting, "Smith, perhaps, went to the other extreme". He once scored a
century before
lunch for Canterbury, and hit 155 in 62 minutes in a club game in Christchurch. ==Outside cricket==