[2] However, after the NCAA declared that all players could participate in the season without losing a year of eligibility, Thomas decided to play, despite missing summer workouts.

[3] On October 31, 2020, Thomas was ejected for targeting Boston College quarterback Phil Jurkovec.

In Week 2, Thomas recorded his first NFL tackle in a 41-10 win against the Los Angeles Rams.

In Week 9 against the Chicago Bears, he recorded 3 tackles and 1.5 sacks (the first of his career) in a 29-9 win for the Cardinals.

In Week 10, he recorded 1 tackle, 1 sack, and the first forced fumble of his career in a 31-6 win against the New York Jets.