| Guernsey Number: 8 | Recruited from: |
| Height: 187cm | Debut: |
| Weight: 85kg | Date of birth: 1986-11-15 |
Brazilian born, O'Brien now has three years of AFL experience under his belt and has become an important component in Collingwood's defence. He played a career-high of 23 games last season and played the fourth-most minutes of any Magpie during the season. He conceded the most goals at Collingwood (35) never conceding more than four in a game. He ranked third at the club in spoils and also swooped on the third most groundball-gets in the defensive 50.
| Rnd | Date | vs. | K | H | D | M | HO | T | FF | FA | G | B |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 22/03/2008 | Fremantle | 8 | 5 | 13 | 4 | 0 | 2 | 1 | 2 | 0 | 0 |
| 2 | 28/03/2008 | Brisbane | 5 | 3 | 8 | 2 | 0 | 1 | 1 | 1 | 0 | 0 |
| 3 | 06/04/2008 | Richmond | 9 | 6 | 15 | 5 | 0 | 4 | 0 | 0 | 0 | 0 |
| 4 | 13/04/2008 | Carlton | 5 | 6 | 11 | 2 | 0 | 1 | 1 | 1 | 0 | 0 |
| 5 | 19/04/2008 | North Melbourne | 6 | 2 | 8 | 5 | 0 | 2 | 1 | 2 | 0 | 0 |
| 6 | 25/04/2008 | Essendon | 5 | 8 | 13 | 2 | 0 | 2 | 2 | 0 | 0 | 0 |
| 7 | 03/05/2008 | Hawthorn | 5 | 7 | 12 | 4 | 0 | 1 | 0 | 1 | 0 | 0 |
| 8 | 16/05/2008 | St. Kilda | 6 | 6 | 12 | 3 | 0 | 3 | 0 | 1 | 1 | 0 |
| 11:44 pm: | Magpies beat Saints and move up table |
| 11:05 pm: | Physical Pies stave off Saints |
| 10:34 pm: | Magpies outclass Saints |
| 09:00 pm: | Pies and Saints set for tense second-half |
| 07:52 pm: | AFL Preview: Round 8 |