He decided to flip his commitment to South Carolina at the end of the season after a recruiting push by then-new head coach Will Muschamp.

Brunson was named a starter at linebacker going into his sophomore season and finished the year as South Carolina's second-leading tackler with 88 along with 4.5 tackles for loss and 2 sacks and three fumble recoveries.

He was named to ESPN's All-Bowl team after making 13 tackles and his first two career sacks against Michigan in the 2018 Outback Bowl.

[7] Brunson made his NFL debut on October 22, 2020, in a 22–21 loss to the Philadelphia Eagles, making one tackle on special teams.

[10] On May 18, 2023, it was announced that Brunson had signed a contract with the Saskatchewan Roughriders of the Canadian Football League (CFL) joining the club's training camp roster.