Jernigan committed to the Tigers on Sunday, announcing his decision on social media, the day after playing a season-high 48 snaps in OSU's Fiesta Bowl victory over Notre Dame. Jernigan, who missed all of the 2020 season following reported heart complications related to COVID 19, played the third-most snaps among OSU's interior D-linemen this season and had the team's second-highest defensive grade (80.4), per Pro Football Focus. He was sixth on the team with 19 pressures. Jernigan appeared in 13 games as a freshman in 2019. The native of Allen Texas, will have two years of eligibility at Missouri for a team that loses two regulars at the D-tackle rotation, Kobie Whiteside and Akial Byers.