The midfielder, a summer signing from Wrexham, faces a lengthy spell on the sidelines.
He was injured during Tuesday night’s 3-2 defeat at Barrow. You can watch all the goals here.
It was a costly evening in more ways than one and Martin Allen has confirmed the bad news.
“Sam will be out for a long time,” the manager announced.
“He was in a lot of pain at the time when it happened. I’ve never been on the pitch to see a player before but it wasn’t far from me and I could see the pain he was in.
“He’s become such an integral part of our group. He’s right in the middle of it. Whether he’s playing or not he’s always the same; he’s bright and bubbly, enthusiastic and encourages all the other players.
“I was thrilled to give him an opportunity to play and he was playing very well. Just to see that agony on his face in that split second was very upsetting.”