Forward Macgraff Leuluai will remain with Widnes for at least the next two seasons after signing a contract extension.
Team news and statistics ahead of this week's First Utility Super League qualifying semi-finals.
Warrington coach Tony Smith will make a late decision on the fitness of full-back Matty Russell ahead of the Wigan game.
Team news for Thursday's Super League play-off semi-final between St Helens and Catalan Dragons.
Hull KR have confirmed the departure of assistant coach Stanley Gene, who is expected to go to Gateshead.
Former London Broncos head coach Rob Powell has returned to the club as their new head of youth.
Catalan coach Laurent Frayssinous has urged his side to "keep on believing" ahead of their Super League play-off at St Helens.
Widnes prop forward Phil Joseph is swapping his rugby boots for boxing gloves in the off-season.
Former Great Britain centre Martin Gleeson is to join the backroom staff of Salford Red Devils after announcing his retirement.
Sheffield Eagles will return to the site of the old Don Valley Stadium in 2016 as part of an Olympic Legacy Park.