Knight's rugby union career was with the
Manly club in Sydney. He represented the
Wallabies on six occasions between 1969 and 1971, once against Scotland and five times against
South Africa. Knight's international debut was against South Africa on the Wallabies' 1969 tour and he met them again during the tumultuous Springbok tour of 1971 that resulted in a groundswell of anti-apartheid expression by Australian demonstrators. He earned a seventh international rugby union cap as a member of a Presidents XV against England in 1970. ==Rugby league==