Following one season at Georgia Military College, Young was ranked the number 10 Junior College prospect and committed to Tennessee over Ole Miss.[3] Initially a backup in his first season at Tennessee in 2021, Young started the last 8 games recording 46 total tackles and led the team with 5.5 sacks.[4]
In the Volunteers Week 6 game against LSU in 2022, Young recorded 2.5 sacks and was named the Southeastern Conference (SEC) defensive lineman of the week for his performance.[5][6] At the conclusion of the season he was named to the All-SEC first team.[7]
Heading into his first training camp & preseason, Byron Young was a starting outside linebacker. At the end of the NFL preseason, head coach Sean McVay named Young a starting outside linebacker to begin the season, opposite Michael Hoecht.
Byron Young made his first career start and NFL debut in the Rams' Week 1 victory against the Seattle Seahawks, notching his first career split-sack and playing in 84% of the defensive snaps during the win.[12] The following week, he notched his first full career sack in the Rams' 30–23 loss to the San Francisco 49ers.[13] He would notch another half-sack in the Rams' 16–19 loss to the Cincinnati Bengals the following week.[14] Against the Green Bay Packers in Week 9, Young recorded his first multi-sack game, although the Rams lost 20–3. [15] He finished the season recording three more sacks in his final five games of the season.
As a rookie, Young played in all 17 games (16 starts) and played in 85% of the team's defensive snaps. He finished his rookie season leading all rookie edge rushers with 8 sacks, 61 total tackles (42 solo), two forced fumbles, and one fumble recovery.[16] Additionally, Young earned PFWA All-Rookie Team honors at the end of the season.[17]