I reckon we have 3 ‘key’ players - Doyle, Yates and Grant. So it’s one of them. Anyone else we have adequate cover for.
These 3 have certainly been the stand out players over the last 6 games. However I believe we have adequate cover upfront if either Doyle or Yates are injured, particularly now that Isgrove and Anderson are back. Yates can play central if Doyle is out and we have DJ and Woolery also to cover the front 3 positions.
In midfield, Doughty's AM role could be covered by Anderson ( assuming 100% fit) although the loss of Lyden would be more of a concern, where Rose, as his replacement, being left footed, somewhat unbalances the team. If its Grant that is out then we are again weakened where Rose, although a more natural replacement than for Lyden, is nowhere near as physically dominant as Grant.
It is central defence that an injury would concern me most, as Baudry and Fryers have been outstanding as a pair and can not be easily replaced. Broadbent is the obvious candidate but is miles away from either in terms of distribution. Wellens comment that we have one or two options might suggest it is indeed a central defender that is injured with the option of Grant moving to centre back. Against Oldham this may not be a major problem, but against the better teams eg FGR, Plymouth, Bradford, this could be an issue if the injury is longer term, hence the requirement to bring in another centre back.
Either full back could be covered by Iandolo, although leaves us short on the bench until Donahue is available.
So in order of who I wouldnt want injured I would go Baudry, Fryers, Lyden, Grant, Doughty, Doyle then Yates.
Based on Wellens comments I suggest either Baudry/Fryers or Doughty as the injured player.