With New Zealand needing 6 runs off the last ball, Australian captain Greg Chappell instructed his brother Trevor Chappell to bowl the final delivery underarm, rolling it along the ground like a lawn bowl. This made it physically impossible for batsman Brian McKechnie to hit a six or even score the runs needed.
The umpires were consulted before the delivery. Crucially, underarm bowling was not explicitly illegal at the time — the Laws of Cricket did not prohibit it. The umpires confirmed the delivery was legal, and Trevor proceeded to roll the ball along the pitch. McKechnie, standing in disbelief, simply blocked the ball with his bat and then threw the bat away in absolute disgust.
The MCG crowd erupted in boos — directed at their own team. This was extraordinary. Australian crowds booing Australian players was almost unheard of, but the act was so transparently unsporting that even home fans couldn't stomach it. The booing continued for several minutes as the players left the field.
Australian wicketkeeper Rod Marsh was visibly furious on the field. He had walked up to Greg Chappell before the delivery and told him it was "a disgraceful thing to do." Ian Chappell, commentating on television at the time, was equally scathing about his brother's decision, reportedly saying it was "one of the worst things I have ever seen on a cricket field." When your own brother condemns you on national television, you know you've crossed a line.
Trevor Chappell later admitted he was deeply uncomfortable bowling the delivery but felt he couldn't refuse his captain — who was also his older brother. "I didn't want to do it," Trevor said in later interviews. "But Greg was the captain, and he was my brother. What was I supposed to do?" The incident haunted Trevor's career, overshadowing his legitimate achievements as a cricketer.
New Zealand captain Geoff Howarth called the act "disgusting," while New Zealand Prime Minister Robert Muldoon went further, telling the press: "It was the most disgusting incident I can recall in the history of cricket. It was an act of true cowardice and I consider it appropriate that the Australian team were wearing yellow." The diplomatic fallout was significant — the incident strained trans-Tasman relations in a way that transcended sport.
Even Australian Prime Minister Malcolm Fraser weighed in, expressing his displeasure. The Australian Cricket Board issued a statement regretting the incident. Greg Chappell initially defended his decision on tactical grounds but later admitted it was a mistake, saying he "would give anything to be able to turn back the clock."