Johnson was knocked in the head by North End's scorer Calum Davidson and fell to the ground where he was attended to by the medics who carried him off with a neck brace in place.
Fortunately it was all precautionary and Roger is set to face W.B.A. tonight. We might even get two central defenders on the pitch with the club hoping Glenn Loovens will be fit to play.
Paul Parry should overcome a tight hamstring and the rest of the squad should all be available.
Albion have defensive problems themselves with three regulars missing. Neil Clement, Paul Robinson and Bostjan Cesar are all likely to be out. There is a suggestion Tony Mowbray might use his squad for this game and make several changes to the side that beat Scunthorpe in the league on Saturday.