New Zealand will take three five-eighths to the Rugby Championship matches in Argentina and South Africa.
Coach Steve Hansen unveiled a 28-man squad for Tests against the Pumas in La Plata on September 29 and South Africa in Johannesburg on October 6.
A calf injury forced Dan Carter to miss the All Blacks last two home Tests, against the same two opponents.
Hansen anticipated the 89-Test veteran would be ready but had selected two others as insurance.
"Dan is recovering well from his calf injury and we are expecting him to be fit for selection for the Argentinian Test," Hansen said.
"However, to be on the safe side we are also taking Beauden Barrett as cover at five-eighth, alongside Aaron Cruden."
The inclusion of Barrett forced Hansen to omit a player in another position.
That was prop Wyatt Crockett, with Hansen content there was enough depth in the front row.
There were no other surprises in the squad who can secure the inaugural Rugby Championship with one round to play if they beat Argentina.
All Blacks tour squad:
Backs: Israel Dagg, Hosea Gear, Cory Jane, Ben Smith, Julian Savea, Conrad Smith, Tamati Ellison, Ma'a Nonu, Dan Carter, Aaron Cruden, Beauden Barrett, Aaron Smith, Piri Weepu
Forwards: Kieran Read, Richie McCaw (captain), Sam Cane, Liam Messam, Victor Vito, Adam Thomson, Sam Whitelock, Brodie Retallick, Luke Romano, Owen Franks, Ben Franks, Charlie Faumuina, Tony Woodcock, Andrew Hore, Keven Mealamu