Mark O'Brien
| Date of birth | 21 November 1992 |
| Place of birth | Dublin |
| Nationality | Irish |
| Weight | 77 kg |
| Height | 1.80 m |
| Position | Defender |
Mark O'Brien's contract at Derby County was extended to June 2015 in September 2011.
He joined Luton Town in July 2015 with a two-year contract before he was made available for transfer in May 2016.
Club history
| Team | Joined | Left | Loan / Trialist |
|---|---|---|---|
| Derby County | 01 Jul 2010 | 30 Jun 2015 | |
| Motherwell | 15 Aug 2014 | 31 May 2015 | L |
| Luton Town | 09 Jul 2015 | 06 Jan 2017 | |
| Southport | 03 Mar 2016 | 03 Apr 2016 | L |
| Southport | 09 Sep 2016 | 09 Dec 2016 | L |
| Newport County | 06 Jan 2017 |
Club stats
| Season | Team | Competition | Apps | Subs | Goals | Y | R |
|---|---|---|---|---|---|---|---|
| 2008-09 | Derby County | League Championship | 1 |
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| 2010-11 | Derby County | League Championship | 2 |
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| 2011-12 | Derby County | League Championship | 15 | 5 |
1
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| 2011-12 | Derby County | League Cup | 1 | ||||
| 2012-13 | Derby County | FA Cup | 2 | ||||
| 2012-13 | Derby County | League Championship | 6 | 3 |
2
|
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| 2015-16 | Luton Town | Johnstones Paint Trophy | 1 | ||||
| 2015-16 | Luton Town | League Cup | 2 |
1
|
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| 2015-16 | Luton Town | League Two | 2 | 4 |
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| 2016-17 | Newport County | League Two | 20 | 1 |
5
|
1
|
|
| 2017-18 | Newport County | FA Cup | 2 | 2 |
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| 2017-18 | Newport County | League Cup | 1 |
1
|
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| 2017-18 | Newport County | League Two | 26 | 2 |
6
|
1
|
Please note: Career stats are based on performances in the Premier and Football Leagues and (in most cases all) internationals.
Club matches
| Date | Match | Result | Competition | Round | |
|---|---|---|---|---|---|
| 03 May 2009 | Watford v Derby County | L | 3-1 | League Championship | |
| 18 Sep 2010 | Barnsley v Derby County | D | 1-1 | League Championship | |
| 09 Nov 2010 | Ipswich Town v Derby County | W | 0-2 | League Championship | |
| 06 Aug 2011 | Derby County v Birmingham City | W | 2-1 | League Championship | |
| 09 Aug 2011 | Derby County v Shrewsbury Town | L | 2-3 | League Cup | 1st round |
| 13 Aug 2011 | Watford v Derby County | W | 0-1 | League Championship | |
| 17 Aug 2011 | Blackpool v Derby County | W | 0-1 | League Championship | |
| 20 Aug 2011 | Derby County v Doncaster Rovers | W | 3-0 | League Championship | |
| 27 Aug 2011 | Derby County v Burnley | L | 1-2 | League Championship | |
| 10 Sep 2011 | Coventry City v Derby County | L | 2-0 | League Championship | |
| 17 Sep 2011 | Nottingham Forest v Derby County | W | 1-2 | League Championship | |
| 24 Sep 2011 | Derby County v Millwall | W | 3-0 | League Championship | |
| 27 Sep 2011 | Derby County v Barnsley | D | 1-1 | League Championship | |
| 01 Oct 2011 | Leicester City v Derby County | L | 4-0 | League Championship | |
| 15 Oct 2011 | Derby County v Southampton | D | 1-1 | League Championship | |
| 18 Oct 2011 | Reading v Derby County | D | 2-2 | League Championship | |
| 21 Oct 2011 | Middlesbrough v Derby County | L | 2-0 | League Championship | |
| 29 Oct 2011 | Derby County v Portsmouth | W | 3-1 | League Championship | |
| 05 Nov 2011 | Peterborough United v Derby County | L | 3-2 | League Championship | |
| 19 Nov 2011 | Derby County v Hull City | L | 0-2 | League Championship | |
| 26 Nov 2011 | West Ham United v Derby County | L | 3-1 | League Championship | |
| 02 Dec 2011 | Crystal Palace v Derby County | D | 1-1 | League Championship | |
| 10 Dec 2011 | Derby County v Bristol City | W | 2-1 | League Championship | |
| 26 Dec 2011 | Derby County v Leeds United | W | 1-0 | League Championship | |
| 27 Oct 2012 | Peterborough United v Derby County | L | 3-0 | League Championship | |
| 24 Nov 2012 | Derby County v Birmingham City | W | 3-2 | League Championship | |
| 08 Dec 2012 | Derby County v Leeds United | W | 3-1 | League Championship | |
| 15 Dec 2012 | Bristol City v Derby County | W | 0-2 | League Championship | |
| 26 Dec 2012 | Burnley v Derby County | L | 2-0 | League Championship | |
| 01 Jan 2013 | Derby County v Middlesbrough | W | 3-1 | League Championship | |
| 05 Jan 2013 | Derby County v Tranmere Rovers | W | 5-0 | FA Cup | 3rd round |
| 12 Jan 2013 | Brighton and Hove Albion v Derby County | L | 2-1 | League Championship | |
| 19 Jan 2013 | Derby County v Nottingham Forest | D | 1-1 | League Championship | |
| 26 Jan 2013 | Derby County v Blackburn Rovers | L | 0-3 | FA Cup | 4th round |
| 02 Feb 2013 | Derby County v Huddersfield Town | W | 3-0 | League Championship | |
Please note: Match history is complete for the Premier and Football Leagues and (in most cases all) internationals.