| P | # | Player | Born | Height | Weight | Contract | |
|---|---|---|---|---|---|---|---|
| M | Mauro Arambarri | 1995-09-30 | 174 | 71 | 2020-06-30 |
| Date | Player | From | To | Status | Src |
|---|---|---|---|---|---|
| 30.Jun | Federico Gino Avecedo (M) | Carpi FC 1909 | Defensor Sporting | Confirmed | |
| 30.Jun | Mauricio Lemos (D) | UD Las Palmas | Defensor Sporting | Confirmed | |
| 1.Feb | Mauro Arambarri (M) | Defensor Sporting | FC Girondins de Bordeaux | Confirmed | |
| 31.Aug | Federico Gino Avecedo (M) | Defensor Sporting | Carpi FC 1909 | Confirmed | |
| 4.Jul | Mauricio Lemos (D) | Defensor Sporting | Rubin Kazan | Confirmed | |
| 18.Jul | Gastón Silva (D) | Defensor Sporting | Torino FC | Confirmed | |
| 25.Apr | Diego Laxalt (M) | Defensor Sporting | Inter Milan | Rumour | |
| 3.Jun | Damián Suárez (D) | Defensor Sporting | Sporting de Gijón | Confirmed | |
| 24.Jun | Leandro Cabrera (D) | Defensor Sporting | Atlético de Madrid | Rumour |