John Duffy - Teams Played Against
| Team | Games | Tries | Goals | DropGoals | Points | First Game Against | Last Game Against |
|---|---|---|---|---|---|---|---|
| Blackpool Borough | 5 | 3 | 0 | 0 | 12 | 30 Aug 1989 | 01 Apr 1991 |
| Bramley | 2 | 2 | 0 | 0 | 8 | 08 Oct 1989 | 21 Mar 1990 |
| Carlisle | 1 | 0 | 0 | 0 | 0 | 25 Nov 1990 | 25 Nov 1990 |
| Castleford Tigers | 1 | 1 | 0 | 0 | 4 | 03 Dec 1989 | 03 Dec 1989 |
| Dewsbury Rams | 6 | 2 | 0 | 0 | 8 | 29 Oct 1989 | 20 Oct 1991 |
| Doncaster | 1 | 0 | 0 | 0 | 0 | 06 Oct 1991 | 06 Oct 1991 |
| Halifax Panthers | 1 | 0 | 0 | 0 | 0 | 04 Mar 1990 | 04 Mar 1990 |
| Highfield/Liverpool/Huyton | 2 | 1 | 0 | 0 | 4 | 01 Jan 1990 | 16 Apr 1990 |
| Huddersfield Giants | 2 | 0 | 0 | 0 | 0 | 26 Dec 1990 | 27 Oct 1991 |
| Hunslet | 3 | 1 | 0 | 0 | 4 | 15 Oct 1989 | 14 Oct 1991 |
| Keighley Cougars | 5 | 0 | 0 | 0 | 0 | 30 Jan 1990 | 08 Sep 1991 |
| Leigh Leopards | 3 | 0 | 0 | 0 | 0 | 02 Dec 1990 | 15 Sep 1991 |
| London Broncos | 4 | 0 | 0 | 0 | 0 | 24 Sep 1989 | 29 Mar 1991 |
| Mansfield/Nottingham | 3 | 0 | 0 | 0 | 0 | 05 Nov 1989 | 14 Apr 1991 |
| Oldham | 2 | 0 | 0 | 0 | 0 | 21 Jan 1990 | 18 Feb 1990 |
| Rochdale Hornets | 1 | 0 | 0 | 0 | 0 | 19 Feb 1991 | 19 Feb 1991 |
| Salford | 2 | 0 | 0 | 0 | 0 | 21 Oct 1990 | 17 Nov 1991 |
| Swinton Lions | 2 | 0 | 0 | 0 | 0 | 03 Sep 1989 | 17 Dec 1989 |
| Whitehaven | 3 | 0 | 0 | 0 | 0 | 10 Sep 1989 | 11 Nov 1991 |
| Workington Town | 2 | 0 | 0 | 0 | 0 | 07 Jan 1990 | 04 Feb 1990 |
| York Knights | 1 | 0 | 0 | 0 | 0 | 25 Feb 1990 | 25 Feb 1990 |