Boak went on to play in the Port Adelaide team which competed in the 2007 AFL Grand Final against Geelong, losing by a record margin.

At the start of 2008, Boak picked up where he left off, playing a greater role in the Port Adelaide midfield alongside senior players such as Domenic Cassisi, Kane Cornes and Shaun Burgoyne.

He along with Jackson Trengove were jointly crowned the John Cahill Medallist, the first time that there had been a tie at the club's best and fairest award since 1893.

In 2014, Boak continued where he left off from 2013, averaging a career best 26.6 disposals a game and tolling a season best 21 Brownlow votes to finish equal 4th.

In 2019, after stepping down from the captaincy at the end of the previous season, Boak made a permanent shift back to the midfield, enjoying career-best numbers.

[10] He went on to have a career-best season, earning selection as vice-captain in the 2020 All-Australian team[11] and finishing second and third respectively in votes for the Leigh Matthews Trophy and AFLCA champion player of the year award.

Following almost 12 years of work with the association, Boak regularly volunteers his time to visit children and teens in hospitals.