[1] He recorded six tackles, a sack, a forced fumble, and a touchdown on an interception return to earn Defensive MVP honors for the game.

He played in all 13 games for the Horned Frogs as sophomore, recording 4.5 sacks and blocking a field goal against Georgia in the 2016 Liberty Bowl.

[4] He recorded 4.5 sacks again as a junior, including one in a crucial late-game situation in the Frogs' comeback win over Stanford in the 2017 Alamo Bowl.

He had the biggest play of his early career when he stopped New England Patriots quarterback Cam Newton on the 1-yard line to secure a Week 2 35–30 victory on Sunday Night Football.

[14] In Week 11 against the Arizona Cardinals on Thursday Night Football, Collier recorded his second career sack, taking down Kyler Murray during a 28-21 win.