[2] Farrell was rated a four-star recruit and committed to play college football at LSU over offers from Michigan, Alabama, Florida, USC, and South Carolina and signed with the team despite a late recruiting push by Florida State.

[3][4] Farrell played in the first five games of his freshman season and recorded five tackles with one quarterback hurry before suffering an injury.

[6] Farrell initially announced that he would opt-out of his senior season due to family health concerns regarding the COVID-19 pandemic, but later reversed his decision.

[10] After the conclusion of his college career, he played in the 2022 Senior Bowl and was named the best defensive lineman for the American Team.

[15] On August 29, 2023, Farrell was traded to the Kansas City Chiefs in exchange for sixth-round selection in the 2024 NFL draft.