Jack played in a few of our pre season friendlies. I never saw him play, but judging by the comments from those who did, he wasn't very good. The only good thing he had going for him was that he was tall. he had previously been at Motherwell, but was released.
Barsnely currently sit second in division 2 in England, so this is a move almost akin to Millwall signing the crap (and currently clubless) Sergei Baltacha. The striker had been training with Barnsley for a few months and they have now signed him on a non contract basis, whatever that is.
Story source: The Official Barnsley Website