Additions
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 12/2019 |  | Andy Myler | MA | |||
| 11/2019 | | Michael McHugh | DF |  | Shelbourne FC | Shelbourne FC |
| 09/2019 |  | Ethan Kos | DF |  | Strikers FC South Bay | Strikers FC South Bay |
| 08/2019 | | Ciaran Behan | MF | |||
| 08/2019 |  | Maciej Tarnogrodzki | MA | |||
| 08/2019 | | James Daly | MF | |||
| 07/2019 | | Sam Byrne | FW |  | Bohemian FC | Bohemians |
| 07/2019 | | Liam Kerrigan | MF |  | Sligo Rovers | Sligo Rovers |
| 07/2019 | | Jack Keaney | MF | | Sligo Rovers | Sligo Rovers |
| 07/2019 | | Isaac Akinsete | DF | |||
| 07/2019 | | Daniel Mullen | DF |  | UC Dublin U19 | UC Dublin U19 |
| 07/2019 | | Hugh Torfeldt | MF | |||
| 06/2019 | | Aaron McGrath | DF | |||
| 05/2019 | | Dara Keane | MF | |||
| 05/2019 | | Harry McEvoy | MF | |||
| 05/2019 | | Danú Kinsella-Bishop | FW | |||
| 01/2019 | | Tom Murphy | GK | |||
| 01/2019 | | Luke Boore | DF | |||
| 01/2019 | | Mark Dignam | DF | | UC Dublin U19 | UC Dublin U19 |
| 01/2019 | | Richie O'Farrell | MF |  | Belvedere FC | Belvedere FC |
| 01/2019 | | Jack Ryan | MF | | UC Dublin U19 | UC Dublin U19 |
Departures
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 11/2019 | | Conor Kearns | GK |  | St Patrick's Athletic | St Patrick's A |
| 11/2019 | | Jason McClelland | DF | | St Patrick's Athletic | St Patrick's A |
| 07/2019 | | Conor Crowley | MF |  | Cabinteely FC | Cabinteely FC |
| 07/2019 | | Gary O'Neill | MF |  | Shamrock Rovers | Shamrock |
| 07/2019 | | Conor Davis | FW |  | Derry City | Derry City |
| 07/2019 |  | Neil Farrugia | FW | | Shamrock Rovers | Shamrock |
| 02/2019 | | Andrew Farrell | MF |  | Wexford FC | Wexford FC |
| 01/2019 | | Sean Quinn | MF | | Shelbourne FC | Shelbourne FC |
| 01/2019 | | Daire O’Connor | FW |  | Cork City | Cork City |