"I'll do it if they want me to do it, but I didn't want to come back in and say give me the captaincy," she said.
Few, if any players, have tackled the rigours of international hockey and its demanding schedule with a baby in tow, but Hager says 31-year old Whitelock is a player of unique ability.
"Kayla leads by her example. She's a fearless player on the field, and has a desire to win every contest she's in and that really spills over into the group."
Says Whitelock: "I just wanted to play, fit back into the group and get my groove going. Naturally, I'm going to help out as a leader, but the girls have been doing a great job so I'm just happy doing what I'm doing."
The Black Sticks are in the second week of having the full national squad centralised in Auckland. With 25 players vying for 16 places in the Rio squad, Hager has been impressed with the attitude and work ethic.
"There's been no complaints, they've dug in and got into the business."
The selectors will name a squad in a couple of weeks to head to Darwin for a Four Nations and then the Champions Trophy in London in June. The final squad of 16 to go to Rio will be announced in early July.