Wales U-21 player Ledley suffered the injury during a training session and could be out for up to six weeks.
Lennie Lawrence confirmed on the club's website that: "Joe picked up the injury in training today.
“It was an unfortunate injury that happened as Joe turned – there was no contact from anyone else.
"We expect him to have his foot in plaster for three-to-four weeks."
“As a result he will obviously miss the remaining games and we expect home to be recovered in time for pre-season training.
Following their win over