A rising star who played 10 times for the Māori All Blacks, Wainui had a brief spell with the Crusaders, before joining the Chiefs in 2018.
He went on to make 44 appearances for the Chiefs and broke the record for number of tries in a Super Rugby game when he scored five against the Waratahs earlier this year.
Wainui, who is survived by his wife Paige and two children, had joined the Bay of Plenty this season.
“We know Sean’s passing will be felt deeply by everyone involved in rugby, particularly his Bay of Plenty and Chiefs teammates, and we share their sorrow and their shock.”
“The sole occupant of the vehicle died at the scene,” continued the statement that did not name the driver.
Police told CNN that formal identification of the body is yet to take place.
“He will be remembered for being a passionate, hard-working, proud Māori who was an exceptional player, but more importantly, father and husband.
“He was an influential member in the teams he has been a part of, and his presence will be missed.”
The Māori All Blacks is a historic team in New Zealand with a prerequisite that every player must have Māori ancestry, different from the All Blacks international side.
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