[1] Matenga made his starting debut for Otago in their Ranfurly Shield challenge against Canterbury on 12 September 2009.
[1] He was a part of the Highlanders' wider training squad for the 2010 Super Rugby season.
Looking for a better salary and easier rugby Matenga signed with the Kubota Spears in the Top League in Japan for the 2012–13 season.
[citation needed] On the 28 October 2015 Matenga was named in the Blues squad for the 2016 Super Rugby Season.
[2] Matenga was an original member of the New Zealand band, Six60, playing as a Bass guitarist.