Craig Robinson (nose) and Kashley Watkins are definitely ruled out but Benson is hopeful at least one of Murtza, Reilly and St Hilaire can be passed fit.
Benson said: “We went really well against Leigh and it tells me we’ve been doing the right things in pre-season.
“I’ve no idea what Rochdale’s team is going to be or how they’re going to play, so we’re focussed on ourselves.
“I do look forward to these derby games, though. There’s always a lot of emotion and a great atmosphere.”
“I think it will be a forward battle on Sunday and the weather might eliminate some of the fancy skills.
“We’ll just have to roll our sleeves up and rip in to the hard work.”