[7] It was later revealed in April that Duffey was found responsible for two counts of sexual misconduct, violating Title IX policies.

[9] Duffey entered the 2018 season in a competition for the starting quarterback position against junior McLane Carter and freshman Alan Bowman.

[10] Carter would start in the season opener against Ole Miss but suffered a high ankle sprain in the 2nd quarter and was replaced by Bowman.

[11] On September 29 against West Virginia, Bowman suffered a partially collapsed lung late in the 2nd quarter with Duffey replacing him.

[12] The Red Raiders trailed 35–10 when Duffey entered the game and he led a comeback attempt, but threw a costly pick six in the 4th quarter with Texas Tech losing 34–42.

[15][16] Duffey would enter the 2019 season as the third quarterback on Texas Tech's depth chart behind returning starter Alan Bowman and Rice transfer Jackson Tyner.

Bowman suffered a left shoulder injury against Arizona with Tyner being named the Red Raiders' starting quarterback for the Oklahoma game.

[28] In July, Duffey enrolled at Hampton University, but shortly after his arrival there it was announced the school would be cancelling all fall sports for the upcoming semester due to the COVID-19 pandemic.