The game was called off half an hour into the first half.
Northland Rugby Union operations manager Kyal Collins, who was at the event, said it was a relief to hear yesterday the boys had been discharged from hospital.
The boy with the head injury had been drifting in and out of consciousness and will now have a mandatory 23-day stand-down. Mr Collins did not know whether he hit his head in a tackle but said at least 80 per cent of the new "blue card" incidents for head injuries involved clashes in tackles.
His teammate who hurt his neck had just come out of a ruck and may have taken a post-tackle knock.
Mr Collins said the club had good systems in place. The injuries come almost a year after the death of Otamatea Hawks player Jordan Kemp. The 17-year-old died in hospital after he was knocked out during a match. Club president Kevin Robinson said that tragedy was on everyone's mind as the two young players were rushed off to hospital on Saturday.