Senior prop Charlie Faumuina has been ruled out for the season as the Blues contemplate a troubled buildup to their next clash with the Hurricanes.
Backup halfback Bryn Hall broke his jaw and lock Liaki Moli injured a knee ligament in weekend club rugby while wing George Moala is banned for his high shot on Highlanders wing Buxton Popoali'i. Waisake Naholo is likely to get Moala's role.
Faumuina has torn his calf muscle and with forecasts about his return as long as 14 weeks, the Blues have decided to replace him rather than risk a recurrence if they pushed his recovery.
Those dramas were balanced by the side's 29-18 victory against the Highlanders when former skipper Keven Mealamu returned from his sabbatical and halfback Piri Weepu hinted at his top form.
"He's heading that way. He was a month behind in his training but is match fit now and ready to play his best," coach John Kirwan said.