Cameron Oakley, 25, of Portland, pleaded guilty in the Supreme Court of Victoria on May 11 to manslaughter.

On Friday he was jailed for nine years and six months.

Mr Hutchins, 24, was pronounced dead at Portland District Health in the early hours of August 6, 2019. He suffered five stab wounds, some up to 10 centimetres deep and one penetrating his lungs and heart.

The court heard the two men were long-term rivals with two confrontations occurring in the eight weeks before Mr Hutchins' death.

Then in August, the pair met by chance at a public toilet on Henty Street.

Upon sighting Oakley's car, Mr Hutchins can be seen on CCTV shadow boxing outside the toilet block.

Oakley then comes out, armed with a pocket knife.

The pair can be seen throwing punches at each other before Mr Hutchins is stabbed multiple times to the abdomen and neck.

While Mr Hutchins was rushed to hospital, Oakley went home and used a grinder to chop the knife into about 20 pieces.

He then sent messages to his friends telling them he had stabbed the victim.

"Bro, I've one-upped you with Lachy. I stabbed him," one text message read

Justice Paul Coghlan said he accepted that the confrontation was not planned and that Oakley, upon walking outside the rest rooms and being struck by the victim, used "excessive self-defence".

But he said he did not believe Oakley was scared of the victim.

"I'm satisfied you were wary of him but do not accept that you feared for your life," Justice Coghlan said.

"That view is somewhat reinforced from the content you sent in text messages after the stabbing."

Justice Coghlan said the unnecessary death of young people was painful.

He said the offending was a serious example of manslaughter and no sentence would be consolation to Mr Hutchins' family and friends.

Justice Coghlan said the victim suffered five stab wounds, some up to 10 centimetres deep and one penetrating his lungs and heart.

He said CCTV footage of the offending showed that the victim was clearly unarmed.

"That was apparent at an early stage," he said.

"You had chosen to be armed."

In sentencing, Justice Coghlan said Oakley had good prospects of rehabilitation, a number of positive character references and strong family support.

He said Oakley had made good use of his 654 days in pre-sentence detention, working as a cleaner and looking out for other inmates.

But he said the man had an extensive criminal history involving unlawful assaults and other injuries.

Justice Coghlan accepted the man suffered complex post traumatic stress disorder, anxiety and depression which he said stemmed from childhood trauma.

He said he accepted Oakley was remorseful.

Oakley must serve a non-parole period of six and a half years.

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