Warriors captain Roger Tuivasa-Sheck is on baby watch and will miss their NRL match against Parramatta in Sydney.
The classy fullback is expecting the arrival of his first child with fiancee Ashley Walker and has withdrawn from Friday night's clash with the last-placed Eels at ANZ Stadium.
He didn't join his teammates on Thursday's flight from Auckland, NZME reported, with Charnze Nicoll-Klokstad called into the squad as his replacement.
It is unclear who will start at fullback, with new signing Gerard Beale perhaps favoured in what would be his first appearance for the club.
Experienced Kiwi international Beale was named on an extended bench after coming through a reserve-grade appearance last week - his first significant game since breaking his leg at the World Cup.
Specialist winger Nicoll-Klokstad is unlikely to fill that void. His seven-first grade appearances all came last year, when he scored seven tries.
It means the Warriors will be without two of their most-important attacking players, with halfback Shaun Johnson sidelined for a second week with an ankle problem.
Injured pair Mason Lino and Issac Luke are expected to start at halfback and hooker respectively.