But the loss of Guptill's digits didn't hold him back. He was drafted into the Avondale College First XI in third form, and played goal keeper for the school's First XI football side, plus stints with rugby, softball and Kilikiti.
"I think he was obsessive about all sports," Peter said. "As he went through school he played most of the teams on the go."
Peter, 62, watched his son decimate the West Indian bowling attack yesterday at a pub in Royal Oak.
"It was nerve-wracking for a while but by the time he got to about 70 you relaxed, and then just hope he can go on and keep going, and he did."
Peter said the battered white ball that his son smashed on to the stadium roof yesterday had been retrieved and was presented to Guptill after the game. A photo emerged of it on Twitter today, with the message: "Good effort from the stadium to retrieve this from the roof for @Martyguptill #souveneir."
Peter said it was the second time his son had a dispatched a cricket ball to the stadium's roofing iron.
"He's hit it up there once before."
He's now looking forward to watching his offspring take on South Africa on Tuesday at Eden Park and hopes the Black Caps can go all the way.
"I think they can but they just have to forget about the next game (the final) and concentrate on the game coming up.
"A couple of them fire again batting and a couple of the bowlers have a good day - I think they've got a good chance."