Widnes have confirmed that prop Eamon O’Carroll will miss the remainder of the season with a broken arm.
O’Carroll, 25, only joined the Vikings last month, making his debut in the 40-10 home win over Castleford.
The Vikings take on Hull KR this weekend, looking to record back-to-back wins for the first time this season, against a Rovers side that have lost their last four.
Coach Denis Betts said: “Our process has been exactly the same and the players know that there are still many big challenges ahead of us. We have always talked about the second half of the year as a big driver and you can really start to see the players’ self belief growing.
“Regardless of recent results, Hull KR are a very good side. They have got fantastic strike players and two front rowers who have played at State of Origin level. Craig (Sandercock) is a really good coach and I know he will be working hard to get a response this week.”