Campbell was selected by the Lions in the first round of the 2023 NFL draft, and named to the All-Rookie Team.

As a Junior and Senior, he led Cedar Falls to back-to-back 4A State Basketball Championships in 2018 and 2019, respectively.

[3][4][5] He returned as a starter his junior year in 2021, recording 140 tackles, two interceptions, a sack and a touchdown.

[6][7][8] After the 2021 season, Campbell was named first-team all Big Ten, leading one of the best defenses in the country.

Against Minnesota, Campbell's forced fumble and long interception return, both in the fourth quarter, enabled Iowa's victory despite being outgained and unpossessed.