Mauga is from Waianae, Hawaii and went to Waianae High School. During his 2016 season, he had a total of 43 tackles, and 19 tackles-for-loss, according to 24/7 Sports. This past season he won the 2017 Hawaiian Defensive Player of the Year. 24/7 Sports also reported Mauga as the 164th 2018 top player recruit and the 14th top outside linebacker recruit of 2018. He is ranked the number 1 2018 football recruit in Hawaii.
Mauga is ready to make an impact as an outside linebacker at spring camp and in the 2018-2019 season.