| P | # | Player | Born | Height | Weight | Contract | |
|---|---|---|---|---|---|---|---|
| D | Ben Turner | 1988-01-21 | 193 | 91 | 2014 jun | ||
| D | Kelvin Lomax | 1986-11-12 | 180 | 78 | |||
| D | Marc Tierney | 1985-08-23 | 183 | 71 | |||
| D | Stefan Stam | 1979-09-14 | 188 | 83 | |||
| M | Chris Taylor | 1986-12-20 | 183 | 73 | |||
| M | Craig Rocastle | 1981-08-17 | 188 | 77 | |||
| M | Gary McDonald | 1982-04-10 | 185 | 73 | |||
| M | Tomasz Kupisz | 1990-02-02 | 180 | 76 | |||
| F | Chris Porter | 1983-12-12 | 185 | 83 | |||
| F | Lewis Grabban | 1988-01-12 | 183 | 78 | 2019-06-30 |
| Date | Player | From | To | Status | Src |
|---|---|---|---|---|---|
| 30.Jun | Queensy Menig (F) | Oldham Athletic | FC Nantes | Confirmed | |
| 30.Jun | Connor Ripley (GK) | Oldham Athletic | Middlesbrough FC | Confirmed | |
| 9.Jul | Connor Ripley (GK) | Middlesbrough FC | Oldham Athletic | Confirmed | |
| 8.Aug | George Elokobi (D) | Wolverhampton Wanderers | Oldham Athletic | Confirmed | |
| 26.Nov | Dean Bouzanis (GK) | Free Agent | Oldham Athletic | Confirmed | |
| 3.Nov | Luca Scapuzzi (F) | Manchester City | Oldham Athletic | Confirmed | |
| 24.Mar | David Stephens (D) | Oldham Athletic | Southampton FC | Confirmed | |
| 18.Mar | Jean-Yves Mvoto Owono (D) | Sunderland AFC | Oldham Athletic | Confirmed | |
| 17.Feb | Sam Mantom (M) | West Bromwich Albion | Oldham Athletic | Confirmed | |
| 7.Jan | Ben Amos (GK) | Manchester United | Oldham Athletic | Confirmed |