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 | |
|---|---|---|---|---|---|
| 07 Jan 2017 | Stevenage v Newport County | L | 3-1 | League Two | |
| 14 Jan 2017 | Newport County v Colchester United | D | 1-1 | League Two | |
| 21 Jan 2017 | Barnet v Newport County | D | 0-0 | League Two | |
| 28 Jan 2017 | Newport County v Hartlepool United | W | 3-1 | League Two | |
| 04 Feb 2017 | Cheltenham Town v Newport County | D | 1-1 | League Two | |
| 10 Feb 2017 | Newport County v Doncaster Rovers | D | 0-0 | League Two | |
| 14 Feb 2017 | Newport County v Grimsby Town | D | 0-0 | League Two | |
| 18 Feb 2017 | Cambridge United v Newport County | L | 3-2 | League Two | |
| 21 Feb 2017 | Newport County v Morecambe | D | 1-1 | League Two | |
| 04 Mar 2017 | Newport County v Leyton Orient | L | 0-4 | League Two | |
| 11 Mar 2017 | Crewe Alexandra v Newport County | W | 1-2 | League Two | |
| 14 Mar 2017 | Morecambe v Newport County | W | 0-1 | League Two | |
| 18 Mar 2017 | Newport County v Blackpool | L | 1-3 | League Two | |
| 21 Mar 2017 | Newport County v Luton Town | D | 1-1 | League Two | |
| 01 Apr 2017 | Newport County v Crawley Town | W | 1-0 | League Two | |
| 08 Apr 2017 | Exeter City v Newport County | W | 0-1 | League Two | |
| 14 Apr 2017 | Newport County v Yeovil Town | W | 1-0 | League Two | |
| 22 Apr 2017 | Newport County v Accrington Stanley | W | 1-0 | League Two | |
| 29 Apr 2017 | Carlisle United v Newport County | L | 2-1 | League Two | |
| 06 May 2017 | Newport County v Notts County | W | 2-1 | League Two | |
| 05 Aug 2017 | Stevenage v Newport County | D | 3-3 | League Two | |
| 12 Aug 2017 | Crewe Alexandra v Newport County | D | 1-1 | League Two | |
| 19 Aug 2017 | Coventry City v Newport County | W | 0-1 | League Two | |
| 22 Aug 2017 | Leeds United v Newport County | L | 5-1 | League Cup | 2nd round |
| 26 Aug 2017 | Newport County v Chesterfield | W | 4-1 | League Two | |
| 02 Sep 2017 | Exeter City v Newport County | L | 1-0 | League Two | |
| 23 Sep 2017 | Newport County v Grimsby Town | W | 1-0 | League Two | |
| 26 Sep 2017 | Crawley Town v Newport County | W | 1-2 | League Two | |
| 30 Sep 2017 | Luton Town v Newport County | L | 3-1 | League Two | |
| 14 Oct 2017 | Forest Green Rovers v Newport County | W | 0-4 | League Two | |
| 21 Oct 2017 | Newport County v Mansfield Town | D | 1-1 | League Two | |
| 04 Nov 2017 | Newport County v Walsall | W | 2-1 | FA Cup | 1st round |
| 10 Nov 2017 | Newport County v Port Vale | D | 1-1 | League Two | |
| 18 Nov 2017 | Accrington Stanley v Newport County | D | 1-1 | League Two | |
| 21 Nov 2017 | Newport County v Barnet | L | 1-2 | League Two | |
| 03 Dec 2017 | Newport County v Cambridge United | W | 2-0 | FA Cup | 2nd round |
| 09 Dec 2017 | Newport County v Carlisle United | D | 3-3 | League Two | |
| 16 Dec 2017 | Cambridge United v Newport County | W | 1-2 | League Two | |
| 23 Dec 2017 | Newport County v Lincoln City | D | 0-0 | League Two | |
| 07 Jan 2018 | Newport County v Leeds United | W | 2-1 | FA Cup | 3rd round |
| 23 Jan 2018 | Newport County v Morecambe | D | 1-1 | League Two | |
| 03 Feb 2018 | Colchester United v Newport County | L | 2-0 | League Two | |
| 07 Feb 2018 | Tottenham Hotspur v Newport County | L | 2-0 | FA Cup | 4th round replay |
| 13 Feb 2018 | Mansfield Town v Newport County | L | 5-0 | League Two | |
| 17 Feb 2018 | Newport County v Notts County | D | 0-0 | League Two | |
| 24 Feb 2018 | Port Vale v Newport County | D | 0-0 | League Two | |
| 06 Mar 2018 | Newport County v Forest Green Rovers | D | 3-3 | League Two | |
| 17 Mar 2018 | Newport County v Luton Town | D | 1-1 | League Two | |
| 24 Mar 2018 | Newport County v Crewe Alexandra | L | 1-2 | League Two | |
| 30 Mar 2018 | Newport County v Coventry City | D | 1-1 | League Two | |
| 24 Apr 2018 | Newport County v Accrington Stanley | W | 2-1 | League Two | |
| 28 Apr 2018 | Newport County v Cambridge United | W | 2-1 | League Two | |
| 05 May 2018 | Carlisle United v Newport County | D | 1-1 | League Two | |
Please note: Match history is complete for the Premier and Football Leagues and (in most cases all) internationals.