In October 2012, he was named in the Hurricanes squad for the 2013 Super Rugby season. He scored a try on debut against the Stormers on 27 April 2013, playing on the wing. After the departure of the Hurricanes' long-serving midfield combination, Ma'a Nonu and Conrad Smith, Proctor became a regular starter for the club in 2016. At the end of the season, Proctor started for the Hurricanes in the 2016 Super Rugby Final, in which the team won Super Rugby for the first time. Proctor's form continued into the 2017 season, leading to rumours of an All Black call-up. However, Proctor lost his place in the starting lineup in 2017, after struggling with injury, while midfield team-mates, Vince Aso and Ngani Laumape, were the top two scorers of the competition for the year. Although Proctor missed the Hurricanes' historic fixture against the touring British and Irish Lions, in 2017, he did start for the Māori All Blacks against the Lions, in a 10-32 loss, on 17 June 2017. Having re-gained his place in the Hurricanes' starting XV in the 2018 Super Rugby season, Proctor was then named as Wellington's Captain for the 2018 Mitre 10 Cup, succeeding England international flanker, Brad Shields, as the team's leader. Proctor was named in the New Zealand's 51-man All Blacks squad for the 2018 end-of-year tour, by All Black Head Coach Steve Hansen, in the wider training squad to travel to Japan. In the absence of New Zealand's regular starting lineup, who travelled to Europe earlier than the rest of the team, Proctor was named to start in the 3 November test against Japan. Proctor was one of eight players to make their test debut for New Zealand in the game, including his Hurricanes team-mate Gareth Evans, as well as only two players to start on debut that day, the other being Blues loose forward, Dalton Papalii. Proctor had a fine performance and scored a try on his debut, with New Zealand beating Japan by 69-31.
Northampton Saints
On 11 January 2019, Northampton Saints of the Gallagher Premiership announced that Proctor had signed a three-year deal with the club ahead of the 2019/20 season.
