Bonitto played in three games as a true freshman before using a redshirt on the season.[4] He became a starter at outside linebacker six games into his redshirt freshman season and finished the year with 43 tackles, 6.5 tackles for loss and 3.5 sacks.[5][6][7] As a redshirt sophomore, he recorded 29 tackles with ten tackles for loss and 7.5 sacks and was named a second-team All-American by the Associated Press.[8] Bonitto repeated as a second-team All-Big 12 selection after finishing his redshirt junior season with 39 total tackles, 15 tackles for loss, 7 sacks and one forced fumble. Following the conclusion of the regular season, he announced his decision to forgo his redshirt senior season and enter the 2022 NFL draft as well as opt out of the 2021 Alamo Bowl.[9]
After starting the 2023 season as a backup, Bonitto started over Randy Gregory in the Week 4 matchup against the Chicago Bears. He recorded 2.5 sacks and a forced fumble that led to a scoop and score by Jonathon Cooper in the game.[15][16] Gregory was traded soon after and Bonitto was named the starter.
During the 2024 season, Bonitto became the first Broncos player to have double digit sacks since Von Miller and Bradley Chubb in 2018. In Week 13 on Monday Night Football against the Cleveland Browns, Bonitto intercepted a pass from Jameis Winston, returning it 70 yards for his first career defensive touchdown.[17] In Week 15, Bonitto scored his second touchdown of the season on a 50-yard fumble return against the Indianapolis Colts.[18]
He finished the season with 13.5 sacks and as a result he made his first Pro Bowl appearance and made the 2nd team All-Pro.