Danny Wilson has a number of players just one booking away from a ban, and he has urged his squad to cut down on the cautions to make sure Sheffield United have the strength in depth required for the League One Christmas campaign.
"We've got a few lads who are on four (bookings) and that's something we need to beware of," he told the Sheffield Star.
"To be honest, it`s not that difficult to get booked these days but that doesn't mean we must ignore the situation.
"We've got a lot of games coming up and we want as many players as possible to be available.
"It's one of the reasons why you never ever stop looking at players and, from a coaching perspective, probably always want to add a few more wherever possible."