[5] In his junior season, Brown made the 2017 College Football All-America Team and was one of three finalists for the Outland Trophy.

[6] Oklahoma finished the season 12-2 with a ranking of #3 in the nation, losing to Georgia in the College Football playoffs.

On January 3, 2018, Brown announced he was forgoing his senior year and entering the 2018 NFL draft.

[7] On January 3, 2018, Brown announced his decision to forgo his remaining eligibility and enter the 2018 NFL Draft.

Brown attended visits and private workouts with multiple teams, including the Jacksonville Jaguars, Baltimore Ravens, Philadelphia Eagles, and Detroit Lions.

[13][14] At the conclusion of the pre-draft process, Brown was projected to be a second or third round pick by NFL draft experts and scouts.

[26] After failing to reach a long-term contract, he signed his franchise tag tender on August 2.