Two men with links to the Rebels bikies have been jailed over what a Perth judge described as a frenzied and cowardly act of thuggery in a nightclub.
Piripi Wiremu Mikaere Kingi, 28, was sentenced today in the District Court to two years in prison, after pleading guilty to assault occasioning bodily harm.
Christopher Tumatanui Raharuhi, 20, who is already in jail for another offence, was sentenced to serve an additional nine months after also pleading guilty to the same charge.
Both will be eligible for parole after serving half their sentences.
The court heard that in December 2011, a woman was assaulted by another man at the Vibe nightclub in Rockingham when her brother went to her aid and was also attacked.
He lost consciousness and suffered bruising and swelling to his face, as well as a liver laceration.
Judge Kevin Sleight said the victim was overwhelmed, outnumbered and defenseless.
"He had absolutely no chance," Judge Sleight said.
Kingi's lawyer argued his client felt empathy for the victim but Judge Sleight dismissed the suggestion that Kingi - a father of four with a fifth child on the way - was remorseful.
"This was thuggery in a public place," he said.
Raharuhi's lawyer submitted her client regretted his involvement and only acted out of loyalty to his friends.
But Judge Sleight said it was a "pretty cowardly act" to stomp on someone's stomach when they were already down.
A third man, David James Pye, has also pleaded guilty over the assault, but a psychiatric report has not been completed for him, so he will be sentenced in November.