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| team 1 | score | team 2 |
|---|---|---|
| Derby | 1 - 1 | Peterboro |
| Player details | |
|---|---|
| Name | Mark O'Brien |
| Age | 19 |
| Club | Derby County |
| Position | Defender |
| Squad No | 24 |
| Born | Dublin, Republic of Ireland |
| Player rating | 5.0 (what is this?) |
| Competition | Team | Apps | G | YC | RC |
|---|---|---|---|---|---|
| npower Championship | Derby County | 15 (5) | 0 | 1 | 0 |
| Carling Cup | Derby County | 1 (0) | 0 | 0 | 0 |
29th December 2011
Derby County defender Mark O'Brien will miss the rest of the season after suffering a knee injury in training.
13th September 2011
Derby defender Mark O'Brien has won a new four-year deal as reward for his progress this season.
4th November 2009
Teenage Derby defender Mark O'Brien has undergone successful heart surgery and could return in three months.