It was halfway through the second half when Young finally had to come off with the injury and is now almost certain to miss Town's crucial run-in.
With Darren Barnard suspended and Craig Armstrong ineligible for Saturday's game against Sheffield Wednesday, Nicky Law will be without a left footed defender. Either Jason Crowe or Wes Parker are likely to fill in at leftback with the returning Tony Crane favourite to take Young's place in the centre of defence.