It's a strange one.
I can't see us officially recalling him if he's injured because he trains with Wigan all week anyway. Widnes have also spoke about it and not mentioned anything about an injury so I doubt it's for that.
We had Mossop out on loan last year at Barrow and as soon as a superleague club came in for him we recalled him from there and let Huddersfield have him. It makes sense for these lads to be playing superleague if at all possible.
I wouldn't be suprised to see him at Cas pretty soon.