Suddon played for Hawick.[2] He was deemed a protege of Hugh McLeod, a long-time Hawick prop.[3]
Suddon played for a Scottish Border XV in their October 1962 matches against Durham County and Royal Air Force Rugby Union; both warm-up matches to help selection to the South district side.[4][5]
He played for South of Scotland District.[6]
He played for the Whites Trial side in their match against the Blues Trial side on 9 February 1963.[7] After impressing he then turned out for the Blues Trial side against the Whites Trial side in their final match that season on 2 March 1963.[7]
Suddon played for Scotland Probables in their match against Scotland Possibles on 31 December 1966. However after a poor display by the Probables front row, Suddon was deemed a 'scapegoat' by the Aberdeen Press and Journal when he was left out of the Scotland international team to meet France in January 1967.[8]
He was named for Scotland Probables in their match against Scotland Possibles on 9 January 1971.[9] However he had to withdraw due to a knee injury that he sustained in his club match prior to this. Suddon had to have surgery on his cartilage.[10]
Suddon was capped 13 times for Scotland.[11]
He also played in a combined Scotland-Ireland team that played against England-Wales on 14 October 1972 to mark the SRU centenary.[12]