He took part in the 1914 Great Britain Lions tour of Australia and New Zealand under the captaincy of Harold Wagstaff.
He played in the memorable "Rorke's Drift" Test match against Australia in which England had only 10 players for the last half-hour but won the Ashes, 14–6.
[3] After serving during the First World War, Prosser continued to play for Halifax until a shoulder injury ended his career after the conclusion of the 1923–24 season.
Prosser, who began his professional career for Halifax against Wakefield RFC at Thrum Hall, was buried on the same day of similar match—up in 1939.
[4] Stuart Prosser played scrum-half in Halifax's 0–13 defeat by Leigh in the 1920–21 Challenge Cup Final during the 1920–21 season at The Cliff, Broughton on Saturday 30 April 1921, in front of a crowd of 25,000.