There were wild scenes outside the Victorian Supreme Court after three people were sentenced for their role in a fatal stabbing at a rural cricket ground.

Nathan Roberts Nunan was stabbed to death with machetes at the Diggers Rest cricket ground in February last year.

He was also hit with a baseball bat during the gang attack.

Nikola Andreevski, 22, and John Ray Garcia, 22, were both sentenced to five-and-a-half years' jail for manslaughter causing injury recklessly and affray.

Andreevski will serve a minimum term of three years and Garcia will serve three years and nine months before being eligible for parole.

A 17-year-old boy, who cannot be named, was sentenced to three-and-a-half years' jail for manslaughter, recklessly causing serious injury and affray.

Another man has already been sentenced to 22 years for murder.

The family of the victim stormed out of the court when they heard the sentences.

Outside the court, about 20 supporters of the convicted men targeted the victim's family and threatened the media, including an ABC cameraman.

They also taunted the victim's sister, calling out "our brother's coming home tonight".

Court security staff remained inside the building during the confrontation.

Mr Nunan's relatives described the sentence handed to his killers as "disgusting".

"Young men of this age are over fighting wars in Afghanistan and they're considered brave young men, but in courts like this they're considered immature and therefore their sentences are reduced and it's an absolute double standard and it's just a joke," his aunt, Carmel Nunan, said.

She says she does not believe the accused are sorry for their role in the attack.

"The way we've been treated in court by this family, through the committal hearing where our seats were kicked and we were flicked with elastic bands, just indicates what these people are like," she said.

"I think what you just saw then (outside court) where they've aggravated Nathan's sister, who is obviously still grieving, is disgraceful, just disgraceful."