| Full Name: | Mark O'Brien |
| Country: | Republic of Ireland |
| League: | Football League 2 |
| Club: | Luton Town |
| Height: | 180cm 5'11" |
| Weight: | 77 |
| Age: | 22 |
| Foot: | Right |
| Position: | Centre Back (CB) |
| Attacking Work Rate: | Medium |
| Defensive Work Rate: | Medium |
| Skill Moves: | 2 |
| Weak Foot: | 3 |
| Traits | Injury Prone |
| Specialities |
| ST | 52 |
| CF | 51 |
| LW/RW | 50 |
| CAM | 51 |
| LM/RM | 51 |
| CM | 55 |
| CDM | 64 |
| LWB/RWB | 61 |
| LB/RB | 63 |
| CB | 67 |
| GK | 17 |
PACE | 56 |
| Sprint Speed: | 51 |
| Acceleration: | 63 |
SHOOTING | 38 |
| Finishing: | 35 |
| Long Shots: | 32 |
| Shot Power: | 54 |
| Positioning: | 42 |
| Penalties: | 29 |
| Volleys: | 25 |
PASSING | 48 |
| Short Passing: | 63 |
| Vision: | 40 |
| Crossing: | 36 |
| Long Passing: | 50 |
| Curve: | 40 |
| FK Accuracy: | 31 |
DRIBBLING | 54 |
| Dribbling: | 45 |
| Ball Control: | 61 |
| Agility: | 64 |
| Balance: | 70 |
DEFENSE | 68 |
| Marking: | 68 |
| Standing Tackle: | 68 |
| Interceptions: | 69 |
| Heading: | 67 |
| Sliding Tackle: | 67 |
PHYSICAL | 70 |
| Strength: | 72 |
| Stamina: | 69 |
| Aggression: | 66 |
| Jumping: | 71 |
| Reactions: | 65 |