Last weekend Mr Williams was back in Hawke's Bay to support his team - albeit sans hair and as a spectator - when one of the boys, Finn McCurdy, came up with an idea to give something back.
He suggested the team shave their heads and get sponsors to raise money for the coach who has given so much to them.
"There are a lot of extra costs that crop up when people get sick - all we wanted to do is make it a little bit easier," Mr Tremain said.
Last night 10 boys lined up at Westshore Hotel to lose their hair, along with four parents - coming up with about $2000.
As he had been on so many chilly winter mornings, Mr Williams was there to cheer them on.