Five men who were swept up in a major undercover police investigation into large-scale drug distribution by two motorcycle gangs have been sentenced, including one defendant who had two former All Blacks ask the judge for mercy.

In three back-to-back hearings in the High Court at Auckland this morning, Justice Neil Campbell handed down sentences of home detention or community supervision to Jarrad Singer, Joshua Tofa-Tulisi, Sioeli Fakafanua, Taniela Mafileo and one other co-defendant who continues to have name suppression.

They were among the 14 people arrested at the conclusion of Operation Cincinnati, in which police used recording devices to snoop on Comancheros acting national commander Seiana Fakaosilea and others over the course of months in 2020.

None of those sentenced today were major players in the drug syndicate, which was described as an operation involving the Comancheros and Rebels gangs to import, manufacture and distribute commercial-scale quantities of methamphetamine and MDMA.

Other co-defendants - including Fakaosileo, who was found guilty by a jury last month of conspiring to import roughly $90 million worth of methamphetamine from South Africa - are set to be sentenced later this year.

The five men sentenced today all pleaded guilty in July, as their joint jury trial was scheduled to begin.

All Blacks support

Family members of Tofa-Tulisi - including parents who flew from Australia and his uncle, retired All Black Eroni Clarke - filled the courtroom today as he was sentenced for possession of MDMA for supply and supplying MDMA.

"He sincerely regrets his actions and vows not to repeat them," Clarke said as he stood before the judge, noting that his nephew has never been a gang member and had never been in trouble before. "I ask for mercy.

"He has suffered greatly. He has learnt his lesson."

Tofa-Tulisi, 26, was caught selling ecstasy for $200 per gram or $2000 per ounce between January and December 2020, using an encrypted app that made it difficult for police to establish exactly how much was sold.

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But after a search warrant was served at his home, police found 17 baggies each containing 1 gram each of MDMA. An analysis of his mobile phone uncovered videos of him counting and bundling large quantities of cash.

"You stated you found it at a wedding," Justice Campbell noted of his initial explanation for the stash discovered by police in his car.

While Tofa-Tulisi was dealing the drugs for commercial profit, Crown prosecutor Ben Kirkpatrick acknowledged that he was "very much on the outer periphery" of the syndicate and played a minor role. He also acknowledged the context of what was happening in his personal life at the time.

Tofa-Tulisi had moved to Australia with his immediate family when he was 12 but returned to Auckland in 2019, at age 23, to look after his grandparents who were unwell, the court was told. Most of the money he earned was sent back to his family in Australia as they struggled through the pandemic, the judge noted. His grandfather and great-grandmother died within a week of each other in 2020 and he was without immediate family to lean on for support, the judge also said.

Defence lawyer John Kovacevich read aloud part of a cultural report prepared by All Blacks great Sir Michael Jones, who compared his own Samoan heritage to that of the defendant.

"Whilst not condoning his actions at all, I recognise and appreciate the pressures from within motivated by his innate sense of loyalty and alofe (love) for his family, parents, grandparents and aiga (wider extended family)," Jones wrote.

"As a young Polynesian boy growing up in West Auckland, without a father, I felt this powerful sense of duty and love for my mother and family, who raised me and surrounded me with unconditional love, care and compassion. I recall whenever I worked for a pay cheque I would give almost all of it to my mother. It was not even an option to keep all or even most of it."

Providing for his family brought him immense joy and was expected of him, Jones explained.

"I do hope that this cultural reality for us as Samoan and as evidenced in Josh's motivations and behaviours, is given credence and acknowledgement in any final judgement on the future and life of Joshua," Jones wrote.

While announcing the sentence, Justice Campbell said he accepted Jones' views that the offending was "in part a response to your Samoan culture". The judge described Tofa-Tulisi as a contributing member to his family and, other than the events leading to his arrest, a contributing member of society.

While the offending was serious, the defendant appeared to be genuinely remorseful and had already spent more than four months on bail with a restrictive 24-hour curfew, he noted.

Campbell ordered Tofa-Tulisi to serve 10 months of home detention for both charges, with the sentences to run concurrently.