VIDEO: Fresh casualty for the Chiefs
VIDEO: Fresh casualty for the ChiefsSHARE
The 22-year-old was forced to leave the field after his teammate Angus Ta’avao landed on his ankle during the Chiefs' 13-25 defeat to the Hurricanes last weekend.
Ross becomes the sixth Chiefs man to be ruled out for the season, and the sixth prop forward they have lost since the start of the 2018 campaign.
Like Ross, fellow prop Moli was also ruled out for the season while Nepo Laulala, Kane Hames, Mitchell Graham, and Sefo Kautai are still working their way back to full fitness.
Sam Pratley has been called into the squad as cover.