| Season | League | Apps | Min | Goals | Assists | G+A / 90 | Rating |
|---|---|---|---|---|---|---|---|
| 2020/2021 | Liga de Expansión MX | 26 | 2168 | 0 | 0 | 0 | — |
| 2021/2022 | Liga MX | 2 | — | 0 | 0 | — | 0 |
| 2021/2022 | Liga de Expansión MX | 8 | 462 | 0 | 0 | 0 | 0 |
| 2022/2023 | Liga de Expansión MX | 6 | 12 | 0 | 0 | — | — |
Domestic league competitions only (SportMonks sub_type='domestic'); national-team, continental and cup competitions are excluded. Classification resolved by league id against the canonical leagues index. G+A/90 computed from minutes actually played.
Cohort: 28 Liga de Expansión MX midfielders, 2021/2022, min. 450 minutes. Computed by ranking the full league corpus, not taken from any feed.
Figures computed from the GioScore season-stats database · as of 2026-07-22
Player stats against each opponent club
| Team | MP | W | D | L | G | A | ||
|---|---|---|---|---|---|---|---|---|
 Celaya | 3 | 2 | 0 | 1 | 0 | 0 | 1 | 0 |
 Pumas Tabasco | 2 | 1 | 0 | 1 | 0 | 0 | 1 | 0 |
 Liverpool | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
 Necaxa | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
 Al Hilal | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 0 |
 Al Sadd | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 Cafetaleros de Tapachula | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 Tampico Madero | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
 Raya2 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
William Sergio Mejía Castillo went through 6 Liga de Expansión MX appearances in 2022/2023 (12 minutes) without a goal or an assist. Set beside 28 Liga de Expansión MX midfielders with 450+ minutes in 2021/2022, he lands in the top 1% for match rating; on goals he ranks 17th of 28.
