Chiefs lock Brodie Retallick has broken his ribs and will miss up to six weeks of Super Rugby.
Retallick left the field early in the second half during the Chiefs' 36-32 loss to the Lions on Saturday.
The injury will see the All Black miss the franchise's two-match tour to play the Kings and Jaguares.
The Chiefs have named a 27-man squad, with Stephan Donald included despite not having game time so far this season.
Winger Shaun Stevenson is also still unavailable after injuring his shoulder against the Crusaders in the opening week of Super Rugby, and hooker Hika Elliot is still suffering from concussion symptoms.
Chiefs touring squad – Damian McKenzie, James Lowe, Latu Vaeno, Glen Fisiiahi, Sam McNicol, Seta Tamanivalu, Anton Lienert-Brown, Charlie Ngatai, Aaron Cruden, Stephen Donald, Tawera Kerr-Barlow, Brad Weber, Michael Leitch, Maama Vaipulu, Sam Cane, Tom Sanders, Johan Bardoul, Taleni Seu, James Tucker, Michael Allardice, Hiroshi Yamashita, Siate Tokolahi, Atu Moli, Pauliasi Manu, Mitchell Graham, Rhys Marshall, Nathan Harris.
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