Pickford was filmed swinging punches when a pub row escalated.
It's alleged his fiancee was the target of abuse which led to Pickford losing control. He began trading punches as video footage, recorded on a mobile phone, showed him being pulled away from the bust-up.
He was eventually restrained by three men and led away. Nobody is believed to have been hurt in the incident. Northumbria Police confirmed on Monday night that they are investigating the disturbance.