After being battered into submission by a flurry of two-handed blows, the 44 year-old Botha proclaimed he would "be back".
To those in a capacity-filled stadium, however, it was apparent the long period in which Botha had been a force in international boxing had come to an end - and retirement might well be the best option.
VIDEO: White Buffalo KO'dAlthough the referee immediately stopped the fight, after two minutes 32 seconds of the second round, as the bulky Botha slumped to the canvas for the verdict to go down as a TKO, it would have been a straight knockout with Botha having no chance of beating the 10-count.
Parker took the initiative from the opening bell and clearly won the first round, while demonstrating the kind of maturity which belied the fact that this was only his sixth professional contest at the relatively tender age for a heavyweight of 21.
"He took me by surprise," said Botha afterwards and there appeared little doubt the veteran South African, who had fought numerous highly-acknowledged world champions of the calibre of Lennox Lewis, Evander Holyfield and Mike Tyson, had underestimated an opponent who was less than half his age.
But with Parker's vastly superior movement round the ring, punching power and agility for someone weighing over 102kg, it would have made little difference how Botha had rated his opponent.
It was Botha's 10th defeat in 62 fights, while Parker had ended five of his six successes, in an unbeaten career, inside the distance.
Known as "Explosive Joseph" by his adoring New Zealand supporters, Botha had minimised the Parker challenge in pre-fight conferences and labelled him "Baby Joseph" instead.
"I can't understand what Baby Joseph and his handlers must be thinking in taking on my iron fists at such an early stage of his career," said Botha in pre-fight verbal sparring.
"But that's not my business. I've got a job to do and I'll end it early to minimise the damage done to Baby Joseph."
Ironically, it turned out in reverse as the outclassed Botha admitted afterwards.
"Parker has a great future in the ring if he is handled properly."
On a somewhat bizarre programme, including two women's title fights and one between two midgets, Botha had some measure of compensation for his humiliating demise when his son, Marcel, achieved a victory in his professional boxing debut.
The younger Botha outpointed
Australian Jeremy Sebastian over four rounds against an opponent who had
now lost both his fights as a professional.