McEvoy had to use his renowned nous to avoid serious trouble as Irish challenger The Cliffsofmoher suffered a fatal injury early in the race.
In 2014 two horses Admire Rakti and Araldo were put down following the race.
"It's very sad. It could have been worse, (jockey) Ryan (Moore) could have taken a fall off him, someone could have been seriously injured".
Jamie Stier, Racing Victoria's manager of integrity services, confirmed the news on Tuesday afternoon, The Age reported.
Racing Victoria, the governing body in Australia's southern state, said The Cliffsofmoher "was unable to be saved due to the nature of the injury sustained".
The CliffsofMoher had won $1.7 million dollars for his owners.Today, he broke his shoulder during the 2018 #MelbourneCup & died on track behind the notorious "green screen of death".Animals & #gambling money are a TOXIC mix.Another lovely horse dead.
"Today's tragedy is a stark reminder of the risks these horses face every time they run, and highlights that behind the gloss and glamour of Cup celebrations there is a dark reality".
Hugh Anderson, the United Kingdom and Dubai managing director of Sheikh Mohammed's global racing powerhouse Godolphin, expects the operation to devote as much effort into winning a Cup as ever.
In a statement the RSPCA said there was a growing number of Australians who felt uncomfortable watching horse racing.
Animal rights group People for the Ethical Treatment of Animals has called for an investigation into the death, which it described as "the most recent victim of the cruel annual spectacle".
The Daily Telegraph has reported the star United Kingdom galloper had a fractured right shoulder and "could not be saved". Another attractive horse dead. "There was also great turnouts at our domestic meetings and the race itself delivered a real spectacle for viewer on top of an excellent programme of New Zealand racing".
The horse's trainer, Aidan O'Brien, said he was relieved jokey Moore was unharmed. Only Bobby Lewis and Harry White have won more with four victories apiece.