Career
He was capped twenty-eight times as a lock for Scotland between 1965 and 1970, including one cap as a replacement. Stagg was selected for the 1968 British Lions tour to South Africa and played in three of the four internationals against South Africa. He played club rugby for Sale and was also invited to play with the Anti-Assassins rugby team, a side based in Cumbria in the north of England that played charity and friendly matches at home and abroad.
In 1975 he was living in Zambia and playing rugby for the Ndola Wanderers Reconstruction Finance Corporation when the East African touring side the Tuskers visited.
He played for Zambia in their first ever international on 31 August 1975 at Kitwe.