Career history
Every club M. Duffy has played for, most recent first.| Season | Date | Left | Joined | Fee |
|---|---|---|---|---|
| 21/22 | Jan 1, 2022 | 2012 - 2026 | Free | |
| 2015 - 2019 | – | – |
Northern Ireland U21
|
– |
| 2016 - 2018 | – | – |
Northern Ireland
|
– |
| 16/17 | Feb 1, 2017 | 
Celtic
|
2017 - 2021 | Free |
| 16/17 | Jan 31, 2017 |
Celtic
|
Undisclosed | |
| 16/17 | Jul 1, 2016 |
Celtic
|
2016 | Loan |
| 15/16 | Jul 3, 2015 |
Celtic
|
Loan | |
| 2013 | – | – |
Northern Ireland U19
|
– |
Transfer summary
- Moves
- 5
- Clubs
- 5
- Loans
- 2
- Free transfers
- 2
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