[2][3] As a true freshman, Green played in every game, posting 19 stops, one for loss and a fumble recovery for a touchdown against UCLA.

The honorable mention All-Pac-12 selection also blocked two field goals (tied for fifth nationally) and two forced fumbles.

[9] On March 21, 2018, Green participated at USC's pro day, but chose to stand on his combine numbers and only performed positional drills.

Team doctors from the Texans and Seahawks had Green undergo additional MRIs and concluded his ACL to be intact.

[9][10][11] At the conclusion of the pre-draft process, Green was projected to be a second or third round pick by NFL draft experts and scouts.

[21] He came back to finish with 2.0 sacks, six quarterback hits, two tackles for loss and one fumble recovery in 10 games played.

[22] On November 29th 2021 Green became the first player to block, recover and score for a defensive conversion since the league allowed for the possibility on extra points beginning in 2015.

According to the NFL’s Next Gen Stats, Green reached a maximum speed of 18.41 mph on his 94-yard return, the fastest rate by a defensive lineman as a ball carrier since Jadeveon Clowney in 2019.