| Efrin Castro | |
| Nationality: |  Dominican Republic |
| Birth Date: | 27 October 1975 |
| Racing Licence: | FIA Bronze |
| Current Series: | FIA World Endurance Championship |
| Current Team: | Project 1 Motorsport |
| Years Active: | 2023 |
| Starts: | 1 (1 entry) |
| Wins: | 0 |
| Poles: | 0 |
| Fastest Laps: | 0 |
| Podiums: | 0 |
| Prev Series: | SprintX GT Championship Series – GTS Porsche GT3 Cup Challenge USA – Gold IMSA SportsCar Championship – LMP3 IMSA Prototype Challenge Porsche GT3 Cup Challenge Middle East |
| Prev Series Years: | 2018 2019–2020 2021–2023 2022 2022 2023 |
| Titles: | Porsche Carrera Cup North America – Pro-Am |
| Title Years: | 2021 |
Efrin Castro (born 27 October 1975) is a racing driver from the Dominican Republic.[1] He currently competes in the FIA World Endurance Championship and was the Pro-Am champion of the 2021 Porsche Carrera Cup North America.[2]
| Season | Series | Team | Races | Wins | Poles | F/Laps | Podiums | Points | Position | |
|---|---|---|---|---|---|---|---|---|---|---|
| 2018 | SprintX GT Championship Series - GTS Class | Mühlner Motorsport | 2 | 0 | 0 | 0 | 2 | 44 | 19th | |
| 2019 | Porsche GT3 Cup Challenge USA - Gold Class | ACI Motorsports | 16 | 0 | 0 | 0 | 4 | 433 | 4th | |
| 2020 | Porsche GT3 Cup Challenge USA - Gold Class | TPC Racing | 13 | 6 | 4 | 10 | 13 | 520 | 2nd | |
| 2021 | Porsche Carrera Cup North America - Pro-Am | Earl Bamber Motorsport | 16 | 7 | 4 | 7 | 13 | 318 | 1st | |
| 2022 | IMSA SportsCar Championship - LMP3 | Mühlner Motorsport | 1 | 0 | 0 | 0 | 0 | 0 | NC | |
| IMSA Prototype Challenge | 1 | 0 | 0 | 0 | 0 | 160 | 39th | |||
| Porsche Carrera Cup North America - Pro-Am | Kelly-Moss Road and Race | 16 | 9 | 0 | 11 | 0 | 288 | 2nd | ||
| 2023 | Porsche Sprint Challenge Middle East | Team GP Elite | 2 | 0 | 0 | 0 | 0 | ? | ? | |
| Porsche Carrera Cup North America | Kelly-Moss Road and Race | 16 | 0 | 0 | 0 | 0 | 31 | 17th | ||
| Porsche Carrera Cup North America - Pro-Am | 16 | 7 | 11 | 7 | 14 | 337 | 1st | |||
| FIA World Endurance Championship - GTEAm | Project 1 – AO | 1 | 0 | 0 | 0 | 0 | 4 | 25th | ||
| 2024 | Porsche Carrera Cup North America | Kellymoss |
(key) (Races in bold indicate pole position; races in italics indicate fastest lap)