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 | Botafogo | 29 | 18 | 6 | 5 | 47 | 25 | 22 | 60 |
| 2 | PalmeirasPalmeiras | 29 | 17 | 6 | 6 | 46 | 20 | 26 | 57 |
| 3 | FortalezaFortaleza | 29 | 16 | 7 | 6 | 38 | 29 | 9 | 55 |
| 4 | FlamengoFlamengo | 28 | 15 | 6 | 7 | 45 | 32 | 13 | 51 |
| 5 | Sao Paulo | 29 | 14 | 5 | 10 | 38 | 32 | 6 | 47 |
| 6 | InternacionalInternacional | 28 | 12 | 10 | 6 | 37 | 26 | 11 | 46 |
| 7 | Bahia | 29 | 13 | 6 | 10 | 39 | 33 | 6 | 45 |
| 8 | Cruzeiro | 29 | 12 | 7 | 10 | 35 | 29 | 6 | 43 |
| 9 | Vasco da GamaVasco | 28 | 10 | 7 | 11 | 32 | 38 | -6 | 37 |
| 10 | Atletico Mineiro | 27 | 9 | 10 | 8 | 38 | 40 | -2 | 37 |
| 11 | Gremio | 28 | 10 | 5 | 13 | 32 | 35 | -3 | 35 |
| 12 | CriciumaCriciuma | 29 | 9 | 8 | 12 | 36 | 42 | -6 | 35 |
| 13 | BragantinoBragantino | 29 | 8 | 10 | 11 | 34 | 38 | -4 | 34 |
| 14 | JuventudeJuventude | 29 | 8 | 10 | 11 | 33 | 39 | -6 | 34 |
| 15 | Athletico ParanaenseAthletico PR | 27 | 8 | 7 | 12 | 27 | 31 | -4 | 31 |
| 16 | Fluminense | 28 | 8 | 6 | 14 | 22 | 30 | -8 | 30 |
| 17 | Vitoria | 29 | 8 | 5 | 16 | 32 | 44 | -12 | 29 |
| 18 | Corinthians | 29 | 6 | 11 | 12 | 29 | 38 | -9 | 29 |
| 19 | Cuiaba | 28 | 6 | 8 | 14 | 25 | 39 | -14 | 26 |
| 20 | Atletico GoianienseAtletico GO | 29 | 5 | 6 | 18 | 22 | 47 | -25 | 21 |
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