Duff has not played for the club since April and has undergone two foot operations after discovering he had suffered a dislocation in the middle of his foot - a problem that his doctors had never seen in a professional footballer before.
Duff - Alive And Kicking!
Duff: "It was devastating.
"You should have seen me when I first found out in the surgeon's office, I broke down in tears.
"It was a dislocation in the middle of my foot and the surgeon said he had never seen it on a footballer before and that was a shock.
"It's great to be back training with the lads and I've started my second week.
"You take things for granted and being out for so long has made me appreciate things an awful lot more.
"It's too soon to pin-point a game. It was a horrendous injury. I was the only footballer to ever get it.
"It's a case of taking things one day at a time because I've had my foot up all summer.
"We'll be looking at a couple of reserve games first but hopefully it won't be too long before I'm back."