Castleford have reportedly lodged a complaint with the RFL that Salford had 14 players on the pitch at some stage of their Super League meeting on Saturday.
According to the Yorkshire Evening Post, Tigers chief executive Steve Gill claims at least three plays took place while the Reds had an extra man, around the 76th minute of the game which Salford won 34-30.
It came at a time when Castleford were looking for the decisive score in a game that went both ways throughout.
The Tigers had led the game on four occasions, taking the lead for the final time thanks to Jordan Thompson‘s try in the 67th minute.
Ryan McGoldrick then snared an interception from a Rangi Chase pass on 72 minutes for a try, converted by Marc Sneyd, which gave Salford the 34-30 advantage which was enough for them to claim the two points, and leave Castleford rooted to the bottom of the Super League table.
The game, televised live on SKY Sports at the Salford City Stadium, was Brian Noble’s first in charge of the Reds.