Rugby League Championship

Prohm played in Hull Kingston Rovers Championship winning teams of the 1983–84 season and 1984–85 season.^{[citation needed]}

Challenge Cup Final appearances

Prohm played at centre and scored two tries in Hull Kingston Rovers' 14–15 defeat by Castleford in the 1984 Challenge Cup Final during the 1984–85 season at Wembley Stadium, London, on Saturday 3 May 1986, in front of a crowd of 82,134.^{[citation needed]}

John Player Special Trophy Final appearances

Prohm played at centre and scored a try in Hull Kingston Rovers' 12-0 victory over Hull F.C. in the 1984–85 John Player Special Trophy Final during the 1984–85 season at Boothferry Park, Kingston upon Hull on Saturday 26 January 1985.

Premiership Trophy Final Appearances

Prohm played at centre and scored a try in Hull Kingston Rovers' 18-10 victory over Castleford Tigers in the Final of the 1983-84 Rugby League Premiership during the 1983–84 season.

Prohm played at centre in Hull Kingston Rovers' 36-16 defeat against St.Helens in the Final of the 1984-85 Rugby League Premiership during the 1984-85 season.

County Cup Final appearances

Prohm played at centre in Hull Kingston Rovers' 12–29 defeat by Hull F.C. in the 1984 Yorkshire Cup Final during the 1984–85 season at Boothferry Park, Kingston upon Hull, on Saturday 27 October 1984.

Prohm played at centre, in the 22–18 victory over Castleford in the 1985–86 Yorkshire Cup Final during the 1985–86 season at Headingley, Leeds, on Sunday 27 October 1985.

1982 Kangaroo Tour

Prohm played loose forward and scored a try in Hull Kingston Rovers' 30-10 defeat against the 1982 Kangaroos.^{[citation needed]}

1983 Queensland Tour

Prohm played left-wing in Hull Kingston Rovers' 8-6 victory over Queensland as they toured Papua New Guinea and England part of the 1983–84 Rugby Football League season.^{[citation needed]}