Legg will have a scan on his injury and it's not known yet how long he will be out for.
Barker played in Legg's wide midfield role for the remainder of the game on Saturday but he is primarily a defender, maybe Lennie will move him to left back and push Croft into midfield?
Either way Barker played well on Saturday and must now be relishing his chance. Since his move from Barnsley he's been on the bench but has shown that he is a quality player when called upon.