| Sebastián Fassi | |
| Fullname: | Sebastián Andrés Fassi Álvarez |
| Birth Date: | 1993 5, df=yes |
| Birth Place: | Mexico City, Mexico |
| Position: | Goalkeeper |
| Currentclub: | San Fernando |
| Clubnumber: | 24 |
| Youthyears1: | 2009–2015 |
| Youthclubs1: | Pachuca |
| Years1: | 2014–2015 |
| Clubs1: | Pachuca |
| Caps1: | 0 |
| Goals1: | 0 |
| Years2: | 2015–2016 |
| Clubs2: | → Belén (loan) |
| Caps2: | 3 |
| Goals2: | 0 |
| Years3: | 2016 |
| Clubs3: | → Guayaquil City (loan) |
| Caps3: | 3 |
| Goals3: | 0 |
| Years4: | 2017–2019 |
| Caps4: | 57 |
| Goals4: | 0 |
| Years5: | 2019–2021 |
| Clubs5: | León |
| Caps5: | 0 |
| Goals5: | 0 |
| Years6: | 2020–2021 |
| Clubs6: | → Necaxa (loan) |
| Caps6: | 3 |
| Goals6: | 0 |
| Years7: | 2021 |
| Clubs7: | → Tlaxcala (loan) |
| Caps7: | 16 |
| Goals7: | 0 |
| Years8: | 2022 |
| Clubs8: | Atenas |
| Caps8: | 25 |
| Goals8: | 0 |
| Years9: | 2023– |
| Clubs9: | San Fernando |
| Caps9: | 0 |
| Goals9: | 0 |
| Club-Update: | 20 November 2021 |
Sebastián Andrés Fassi Álvarez (born May 19, 1993) is a Mexican professional footballer who plays as a goalkeeper for Spanish Primera Federación club San Fernando CD.[1]