As a
freshman in 2020, Clark recorded three tackles. In the 2021 season, he totaled ten tackles in three games. In week 12, Clark intercepted quarterback
Blake Shapen to keep the game tied in a 29–28 win over
Baylor. In TCU's semifinal playoff game against
Michigan, Clark intercepted
J. J. McCarthy and returned it 41 yards for the first score of the game. Clark also recorded a fumble recovery in the win. Clark finished his 2022 season with 45 tackles with one going for a loss, five pass deflections, five interceptions, a fumble recovery, and a touchdown, earning honorable mention all-
Big 12 Conference honors. His five interceptions led the Horned Frogs in 2022. During the 2023 season, Clark tallied 21 solo tackles, five pass deflections, and three interceptions. ==Professional career==