I took it that the report on BBC Sport was from professional football as I remember Sully 'retiring ; then turning out for anybody that would pay him £50 allegedly, a game. Mark Lawrenson officially retired injured but played for Chesham Utd and then for a team in Malta and Tampa Bay...
Perhaps Lambert will sign for them now as he has officially retired from football so presumably will just play for fun and a wage of course at a lower level.