Foran failed a fitness test on a shoulder complaint today, but was expected to be available for next week's meeting with South Sydney.
His absence means coach Stephen Kearney would have to rely on three young players to step up against the Raiders.
Ata Hingano and Mason Lino team up in the halves and Nathaniel Roache at hooker.
Hingano, who debuted late last season would be playing just his 12th NRL match and making only his fifth start, while it would be just the seventh appearance for Lino.
While tomorrow's match would be only the 3rd time 21-year-old Roache had started for the Warriors in what will be his 20th NRL match since debut last year.
The match kicks off at Mount Smart Stadium at 4 tomorrow afternoon.
Photo: PHOTOSPORT Warriors playmaker Kieran Foran.