The 2017 title was contested solely by the Pacific nations of Fiji, Samoa and Tonga.

Teams competing in previous years, Canada, Japan and the United States were not scheduled to participate in the tournament for 2017 or 2016 due to the 2019 Rugby World Cup qualifying format.

[4] Touch judges: Nick Briant (New Zealand) Paul Williams (New Zealand) Notes: Touch judges: Paul Williams (New Zealand) Marius Mitrea (Italy) Notes: Touch judges: Marius Mitrea (Italy) Nick Briant (New Zealand) Notes: Note: Number of caps and players' ages are indicated as of 1 July 2017 – the tournament's opening day, pre first tournament match.

On 9 May, John McKee named an extended squad ahead of Fiji's 2017 June tests against Australia, Italy and Scotland and their Rugby Pacific Nations Cup / 2019 RWC Oceania qualification campaign in July.

[8] On 29 May, Alama Ieremia named a 35-man squad ahead of Samoa's 2017 June tests against New Zealand and Wales and their Pacific Nations Cup / 2019 RWC Oceania qualification campaign in July.