Dallas Cowboys
Clark was selected by the Dallas Cowboys in the fifth round (176th overall) of the 2022 NFL draft.[11] On June 23, 2022, it was announced that Clark had undergone spinal fusion surgery in March and would miss part of the season.[12] He missed the first 7 games while being on Reserve/NFI. He was activated on October 5.[13] In Week 8 against the Chicago Bears, he had 6 tackles and one quarterback pressure. In Week 11 against the Minnesota Vikings, he made his first career start and tallied 4 tackles. In Week 15 against the Jacksonville Jaguars, he had a career-high 11 tackles. He appeared in 10 games (5 starts), registering 50 tackles, 2 forced fumbles, one quarterback pressure and 3 special teams tackles.
In 2023, he started the season opener against the New York Giants, collecting 5 tackles and contributing to a 40-0 victory. In Week 3 against the Arizona Cardinals, he led the team with 9 tackles. In Week 9 against the Philadelphia Eagles, he had a career-high 11 tackles (one for loss). In Week 15 against the Buffalo Bills, he tied his career-high with 11 tackles, along with 2 quarterback pressures. In Week 16 against the Miami Dolphins, he had 9 tackles. He made his first career postseason start against the Green Bay Packers, leading the team with 10 tackles (one for loss), while adding one quarterback pressure. He finished with 17 starts, 115 tackles, 8 quarterback pressures, 3 passes defensed and 2 special teams tackles.
In 2024, the Cowboys hired defensive coordinator Mike Zimmer, to replace Dan Quinn who left to become the head coach of the Washington Commanders. Clark's defensive snaps were reduced significantly, after losing playing time to Eric Kendricks, DeMarvion Overshown and Marist Liufau. In Week 6 against the Detroit Lions, he made his second start of the season, tallying 9 tackles (one for loss), a half sack and one pass break up. He appeared in 14 games (2 starts), posting 25 tackles (one for loss), a half sack, one pass breakup and 4 special teams tackles. He was declared inactive in 3 contests.
In 2025, the Cowboys hired defensive coordinator Matt Eberflus. He remained as a backup player, appearing in 8 games, while making 13 tackles. On November 18, 2025, Clark was waived by the Cowboys.[14] The return from injury of Overshown and the acquisition of Logan Wilson made him expendable in the eyes of Eberflus.