Coach John Kirwan has turned to Luatua, rather than the more experienced Keven Mealamu, after consulting the veteran hooker and Kaino, who is out with a finger injury.
Luatua said he was shocked to receive the phone call from Kirwan, but is looking forward to his new role as leader starting with the match against the Rebels in Melbourne on Friday. Luatua captained the team in pre-season.
"I'm gutted about Jerome's injury, but being skipper of the Blues - that's something you aspire to as a kid when you're growing up in this region.
"We want to finish strongly. I've got the skipper's armband now and I want to keep a 100 per cent record."
The mounting injury toll at the Blues will not help Luatua's task. Flanker Luke Braid's immediate future is uncertain due to his third concussion of the season in the 41-24 victory over the Force, with first-five Dan Bowden also out with a groin strain and fullback Charles Piutau sidelined by a knee injury.
Utility back Matt McGahan, 22, the son of former Kiwis league international Hugh, has joined the team for the rest of the season, with loose forwards Airi Hunt and Jack Ram also in as cover but for a shorter period. Hunt, a 20-year-old from the Waitemata club is a 1.95m and 120kg loose forward who has been in the Blues Development team for the past two years.
Ram, 28, plays for Northland and is a former Tonga international.
Luatua was kept on the bench last weekend by rising star Akira Ioane but performed well when replacing Kaino and Kirwan said the captaincy would help Luatua develop.
"We recognise Steven as a future leader in the club and while we are really disappointed with the injury to Jerome, we saw this as an opportunity for the future.
"This experience will help Steven grow as a leader and player and it will be a great support for Jerome in the coming years."
Luatua, 24, said the victory over the Force would give the Blues confidence and that every player in the team had to stand up in the wake of the big run of injuries.
Bowden is likely to be replaced by Ihaia West, with Simon Hickey as his back-up.
"The guys who might not have got many minutes, they know this is their time," Luatua said. "My job as captain is to make them feel comfortable and allow them to express themselves."
- By Patrick McKendry
