San Carlos (Primera Division): every transfer in and out, fees paid and earned, squad market value and €87k earned.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2026-07-30 | Mario González | San Carlos | Alianza | Free |
| 2026-07-01 | Jefry Valverde | Sporting San José | San Carlos | Free |
| 2026-07-01 | Jason Vega | Real Estelí | San Carlos | Free |
| 2026-07-01 | Christian Martínez | Cartaginés | San Carlos | Free |
| 2026-07-01 | Player | Miami FC II | San Carlos | Free |
| 2026-07-01 | Joseth Peraza | San Carlos | Zalaegerszegi TE | Free |
| 2026-01-20 | Neftalí Rodríguez | San Carlos | Real Estelí | Free |
| 2026-01-01 | J. Aguilar | Pérez Zeledón | San Carlos | Free |
| 2026-01-01 | Andrey Soto | San Carlos | Pérez Zeledón | Free |
| 2025-09-02 | Bryan Oviedo | Alajuelense | San Carlos | Free |
| 2025-08-20 | Kevin Berkeley | San Carlos | Veraguas | Free |
| 2025-07-21 | L. Villalba | San Carlos | Cibao | Free |
| 2025-07-02 | Player | Herediano | San Carlos | Loan |
| 2025-07-02 | Joseth Peraza | San Carlos | Zalaegerszegi TE | Loan |
| 2025-07-01 | Christian Martínez | Cartaginés | San Carlos | Loan |
| 2025-07-01 | Neftalí Rodríguez | Guanacasteca | San Carlos | Free |
| 2025-01-17 | Esteban Cruz | Alajuelense | San Carlos | Loan |
| 2025-01-07 | Rachid Chirino | Deportivo Saprissa | San Carlos | Loan |
| 2025-01-04 | Andres Rodriguez | San Carlos | Herediano | Free |
| 2025-01-03 | Danny Carvajal | San Carlos | Herediano | Free |