He played college football at East Carolina and was signed by the Broncos as an undrafted free agent in 2022.
McMillian was a semi-finalist for the Jim Thorpe Award and earned second-team All-American honors for his 2021 season.
[3][4] After going unselected in the 2022 NFL draft, the Denver Broncos signed McMillian as an undrafted free agent.
[7] The Broncos signed him to their practice squad the next day,[8] where he remained until January 3, 2023, when he was elevated to the active roster.
[9] McMillian made his professional debut 5 days later as a starter in the Broncos' Week 18 matchup against the Los Angeles Chargers, in which he played every defensive snap.