The Millers, fourth bottom in the Championship and currently seven points clear of both Wigan Athletic and Millwall, must appear before a three-man independent disciplinary panel after being charged by the governing body.
Farrend Rawson, on loan from Derby County, is at the centre of the charge. The suggestion is that he was not properly registered for the Easter Monday victory by the Millers over Brighton & Hove Albion.
The 18-year-old played the entire 90 minutes, but it is alleged that his youth loan from the Rams had not been extended beyond the already-agreed 28 days. A League statement has promised a decision would be made before the end of the season.
The possible punishments open to the disciplinary panel if Rotherham are found guilty include a warning, a fine or a points deduction.
“Probably like a lot of our supporters I’m surprised when I heard the news. The players and I were gobsmacked,” said Evans.
“We’re not involved in things like forms and contracts, we’re here to pick the players, nominate the players and let other people do the admninistrative side of it.
“That’s all I know. We have to get on with it and we have to let that process take its course behind the scenes.
“I’m not angry. We are together as a football club from our chairman down, we can only best affect the results on the pitch as we can.
“We have to really keep our focus on Fulham and the four matches we have left, and let the process take place behind the scenes.
“What I do 100 per cent believe is that when it gets to a hearing at the Football League, I know a lot of people there and it willbe a full and fair hearing for Rotherham United, I genuinely 100 per cent believe that.”