wing back 
noun Soccer
A player who plays in a wide position on the field, taking part both in attack and defence.Last month's signing of Peter Kennedy has had some people speculating that Paul Jewell might be ready to experiment with a wing back system with three centre backs in defence....
- I suppose I would have to say left back because that is where I have played most of my career, but I can also play in a wing back role or on the left side of midfield.
- The wing back had been the Celtic player closest to Larsson when he collapsed in a challenge with Lyon defender Serge Blanc.