The 23-year-old has signed a four-year deal as he makes a return to his home country.
The forward left Internacional in 2007 to embark on a six-year spell in Italy.
Pato scored 51 goals in 117 appearances for Milan during an injury-plagued career at the San Siro.
Restore Data
| Team | P | W | D | L | F | A | GD | PTS | |
| 1 | Atletico Mineiro | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 2 | Bahia | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 3 | Botafogo | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 4 | BragantinoBragantino | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 5 | CearaCeara | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 6 | Corinthians | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 7 | Cruzeiro | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 8 | FlamengoFlamengo | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 9 | Fluminense | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 10 | FortalezaFortaleza | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 11 | Gremio | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 12 | InternacionalInternacional | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 13 | JuventudeJuventude | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 14 | Mirassol | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 15 | PalmeirasPalmeiras | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 16 | SantosSantos | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 17 | Sao Paulo | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 18 | Sport RecifeSport | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 19 | Vasco da GamaVasco | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 20 | Vitoria | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
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