Highlanders coach Jamie Joseph has called in a 35-year-old hooker and a 34-year-old back as injury cover ahead of Friday's match with the Chiefs.
Southland veteran Jason Rutledge, and former Otago centre Neil Brew will link up with the squad who are winless after three games.
Captain and hooker Andrew Hore popped a rib cartilage during last weekend's loss to the Hurricanes, and his replacement Brayden Mitchell broke a collarbone in the closing minutes.
Rutledge, who was with the Hurricanes last week as the Wellington side were also experiencing a hooking crisis, joins third-choice rake Liam Coltman in the Highlanders squad.
Brew last played for the Highlanders in 2006 and will get a run for the Highlanders Development team against Fiji Warriors at Forsyth Barr Stadium.