It seems as though we've got a bit of a card happy ref in Mr D.
Whitestone from Northampton, it's just his second season on the Football League list as he made the step up from Conference level.
He has never taken charge of a Millers game before, but has dished out 49 yellows this season so far, with two men talking the walk for an early bath. He issued no fewer than six yellows at the Plymouth v Leeds game a month ago, whilst he also took charge in the Bristol Rovers v Macclesfield game, issuing seven yellows and a red.