Duffy is set to return to international cricket for the first time since the ICC Men's T20 World Cup final in March. He missed the recent test series in England to welcome the birth of his first child.
Joining Duffy and Fisher in the pace-bowling department will be Kristian Clarke, Ben Sears, and Nathan Smith.
The 26-year-old Fisher will be making his ODI debut, however he has played one test and one T20I, so has had a taste of international cricket.
Mitchell Santner will resume as the white-ball captain and will be joined in the spin department by Michael Bracewell, Jayden Lennox and Dean Foxcroft.
Tom Latham will take the gloves.
Black Caps coach Rob Walter said he was thrilled to welcome Duffy back, who he also coached during his stint with the Volts.
"Jacob has been a stand-out for us in all formats for the past couple of years," Walter said.
"His skills and experience will be a great addition to our squad and I know he’s looking forward to representing New Zealand again."
Bracewell and Mark Chapman also join the squad, adding nearly 250 international caps worth of experience between them.
Kyle Jamieson, Matt Henry, and Will O’Rourke will miss the series to rest after a heavy workload during the first half of 2026.
Blair Tickner will return home for scheduled surgery on his ankle and was unavailable for selection.
Devon Conway will miss the tour to spend time with his family after the birth of his second child during the England test series.
Rachin Ravindra will also miss the series to take part in Major League Cricket.
The series gets underway in Guyana with the first three matches on July 11, 13 and 16, before the series moves to Bridgetown in Barbados for the final two fixtures on July 19 and 21.
— Allied Media
