| William Mejía | |
| Full Name: | William Sergio Mejía Castillo |
| Birth Date: | 1999 4, df=yes |
| Birth Place: | Monterrey, Nuevo León, Mexico |
| Height: | 1.83 m |
| Position: | Defensive midfielder |
| Currentclub: | Durango |
| Youthyears1: | 2011-2017 |
| Youthclubs1: | Monterrey |
| Years1: | 2018–2022 |
| Clubs1: | Monterrey |
| Caps1: | 0 |
| Goals1: | 0 |
| Years2: | 2018–2019 |
| Clubs2: | → Toledo (loan) |
| Caps2: | 12 |
| Goals2: | 2 |
| Years3: | 2020–2021 |
| Clubs3: | → Atlético Morelia (loan) |
| Caps3: | 36 |
| Goals3: | 0 |
| Years4: | 2021 |
| Clubs4: | → Atlético San Luis (loan) |
| Caps4: | 0 |
| Goals4: | 0 |
| Years5: | 2022 |
| Clubs5: | → Raya2 (loan) |
| Caps5: | 8 |
| Goals5: | 0 |
| Years6: | 2022–2023 |
| Caps6: | 20 |
| Goals6: | 0 |
| Years7: | 2023– |
| Club-Update: | 28 July 2023 |
William Sergio Mejía Castillo (born 21 April 1999) is a Mexican professional footballer who plays as a defensive midfielder at Durango.[1]
| Club | Season | League | Cup | Continental | Other | Total | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Division | Apps | Goals | Apps | Goals | Apps | Goals | Apps | Goals | Apps | Goals | |||
| Monterrey | 2019–20 | Liga MX | – | 3 | 0 | – | 1 | 0 | 4 | 0 | |||
| Atlético Morelia (loan) | 2020–21 | Liga de Expansión MX | 36 | 0 | – | – | – | 36 | 0 | ||||
| Raya2 (loan) | 2021–22 | Liga de Expansión MX | 7 | 0 | – | – | – | 7 | 0 | ||||
| Career total | 43 | 0 | 3 | 0 | 0 | 0 | 1 | 0 | 47 | 0 | |||