"[But] I said in the press conference I was going to rip his head off.
"Hopefully it will take me a few places up the ladder."
His Wanganui cousin and cornerman Paul Berridge said even after all the hard training, the quick finish came as a surprise.
"Would have liked to have a little bit more rounds, I think, that was the word from the camp.
"The time he's had over the last couple of months, trying to get the Sergey [Kovalev] fight, he just wanted to put it out there.
"They're throwing in the towel, so they must have known [about the broken nose]."
Robert Berridge had been frustrated to miss out on a world title shot against the WBO champion Kovalev in August.
While no upcoming fight has been announced, Paul Berridge said the strategy from handlers Duco Events was to get both his cousin and Parker more exposure in the United States, in the case of Robert Berridge, being marketed on his exciting, no-nonsense, brawling style.
"[Duco's] Dave Higgins was saying, 'that's what the American market likes', that sort of fighter."
It is the third straight fight by 'the Butcher' where his opponent has needed medical attention.
In November, top New Zealand fighter Daniel McKinnon had emergency surgery for bleeding on the brain after an absolute war with Berridge, then in February Australia's Kerry Foley broke his hand on Berridge's head before getting his rib broken moments later by a ripping body shot.