Estadísticas del jugador contra cada club rival
| Equipo | PJ | V | E | D | G | A | ||
|---|---|---|---|---|---|---|---|---|
 Grimsby Town | 7 | 3 | 2 | 2 | 0 | 0 | 1 | 0 |
 Crawley Town | 7 | 4 | 2 | 1 | 0 | 0 | 0 | 0 |
 Cambridge United | 7 | 6 | 0 | 1 | 0 | 0 | 0 | 0 |
 Middlesbrough | 6 | 3 | 1 | 2 | 0 | 0 | 0 | 0 |
 Colchester United | 6 | 1 | 1 | 4 | 0 | 0 | 3 | 0 |
 Mansfield Town | 6 | 3 | 2 | 1 | 0 | 0 | 1 | 0 |
 Carlisle United | 6 | 2 | 2 | 2 | 0 | 0 | 0 | 0 |
 Morecambe | 6 | 1 | 4 | 1 | 0 | 0 | 4 | 0 |
 Crewe Alexandra | 5 | 2 | 1 | 2 | 0 | 0 | 1 | 0 |
 Exeter City | 5 | 2 | 2 | 1 | 0 | 0 | 0 | 0 |
 Port Vale | 5 | 2 | 3 | 0 | 0 | 0 | 0 | 0 |
 Stevenage | 5 | 0 | 3 | 2 | 0 | 0 | 0 | 0 |
 Blackpool | 4 | 3 | 0 | 1 | 0 | 0 | 0 | 0 |
 Leeds United | 4 | 3 | 0 | 1 | 0 | 0 | 1 | 0 |
 Notts County | 4 | 3 | 1 | 0 | 1 | 0 | 0 | 0 |
 Ipswich Town | 4 | 2 | 0 | 2 | 0 | 0 | 0 | 0 |
 Forest Green Rovers | 4 | 2 | 1 | 1 | 0 | 0 | 0 | 0 |
 Yeovil Town | 4 | 2 | 0 | 2 | 0 | 0 | 0 | 0 |
 Swindon Town | 4 | 2 | 1 | 1 | 1 | 0 | 2 | 0 |
 Barnet | 4 | 1 | 1 | 2 | 0 | 0 | 2 | 0 |
Mark O'Brien es un defensa profesional. A lo largo de su carrera, Mark O'Brien ha anotado 5 goles y proporcionado 3 asistencias en 200 partidos en 5 clubes. Mark O'Brien aporta experiencia y fiabilidad a la zaga con 200 apariciones profesionales en su haber. Entre los clubes por los que ha pasado — Newport County, Southport, Luton Town, Motherwell — Mark O'Brien fue más prolífico en el Newport County, donde anotó 4 goles en 127 partidos. Mark O'Brien mide 180 cm, pesa 78 kg.
