He played college football at Sacramento State, where he was named the Big Sky Conference's Defensive Player of the Year in 2022.
[1] He attended Hawthorne High School, where he played quarterback and wide receiver on the football team.
Mapu redshirted his true freshman season for the Sacramento State Hornets.
[5] Mapu used the extra year of eligibility granted to college athletes due to the COVID-19 pandemic and returned for a sixth season.
[8][9] In Week 15 against the Kansas City Chiefs, Mapu recorded his first career interception against Patrick Mahomes.