Coach Mark Hager gave Pearce an opportunity at the national camp in mid-January. He liked what he saw of a player he termed "an out-and-out striker".
"We were pretty impressed with some of the skill sets she brought. She scored a few goals, had a good connection with a few of the senior players and had good hockey knowledge," Hager said.
Pearce recently graduated from the Sydney University of Technology with a masters in management, and has been an events assistant in Sydney. She emphasises the importance of teamwork in analysing her game.
"I like to think I help others out a lot, expose their strengths. I'm a real team player, love to score goals and have a good striking mentality," Pearce said.
The versatile McCann was the standout player for New Zealand's under 21 team against India last year "by quite a long way, has a very good work ethic and brings attributes we like", Hager added.
The coach expects the fourth-ranked Black Sticks to win the series well but knows they will be a bit raw.
Black Sticks lineup
Anita Punt (c), Aniwaka Roberts (Capital), Kat Henry, Kirsten Pearce, Petrea Webster (North Harbour), Liz Thompson (Auckland), Georgia Barnett (Central), Sam Charlton, Gemma Flynn, Rose Keddell, Sally Rutherford, Natasha Fitzsimons (Midlands), Brooke Neal, Stacey Michelsen, Ella Gunson (tbc) (Northland), Pippa Hayward, Rachel McCann, Olivia Merry (Canterbury).