Double-chasing Warrington expect to be at full strength for Saturday's Super League semi-final against St Helens at Langtree Park.
Prop forward Garreth Carvell is set to return after missing last Saturday's 24-12 win over Hull with back spasms and coach Tony Smith is confident second-rower Ben Westwood will also return after being out for a month with a knee injury.
"There's a chance of both of them playing so, aside from Gareth O'Brien, we could be at full strength," Smith said.
"I'm pretty confident Garreth will be available and there's a fair chance Benny might make it too so we've got a pretty clean bill of health and some real problems in selection."
Westwood, one of three players shortlisted for the Man of Steel award, has not played since damaging a knee in the Wolves' Challenge Cup final win over Leeds at Wembley and was missed in their home play-off defeat by St Helens.
"He's had a great year," Smith said. "I'm not surprised he's up for Man of Steel. He has deserved that nomination. He's in there with some pretty high-calibre players and he's not out of place, in my eyes.
"We've shown we can cope without him but it would be nice to have him there with us."
Mike Cooper and Simon Grix are likely to make way, enabling Smith to field his Wembley line-up.