| U23 Campeonato Brasileiro 2021 2a Fase - Appearances as Referee |  |
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 |
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| 03/10/2021 | Avaí - SC | - | Grêmio Porto Alegre | 1:2 | 9 | - | - |
| U23 Campeonato Brasileiro 2021 2a Fase - Appearances as Referee | |
|
|
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| 03/10/2021 | Avaí - SC | - | Grêmio Porto Alegre | 1:2 | 9 | - | - |
| Complete name: | William Machado Steffen |
| Born: | 19/08/1987 |
| Place of birth: |
Brazil |
| Nationality: |
Brazil |