| Jack Duncliffe | |
| Fullname: | Michael John Duncliffe |
| Birth Date: | 17 September 1947 |
| Birth Place: | Brighton, England |
| Position: | Full back |
| Years1: | 1965–1968 |
| Clubs1: | Brighton & Hove Albion |
| Caps1: | 22 |
| Goals1: | 0 |
| Years2: | 1968–1970 |
| Clubs2: | Grimsby Town |
| Caps2: | 72 |
| Goals2: | 0 |
| Years3: | 1970–1973 |
| Clubs3: | Peterborough United |
| Caps3: | 120 |
| Goals3: | 0 |
| Years4: | 1973–1974 |
| Clubs4: | Cambridge City |
| Years5: | 1974–197? |
| Clubs5: | Wisbech Town |
Michael John Duncliffe (born 17 September 1947) is an English former professional footballer who made more than 200 appearances in the Football League playing as a full back for Brighton & Hove Albion, Grimsby Town and Peterborough United.[1] [2]