In his first collegiate game in week one of the 2021 season, Green tallied a sack in a win over Southern Utah.[3] In the 2021 Las Vegas Bowl, he recorded two sacks in a loss versus Wisconsin.[4] Green finished his freshman season playing in 12 games where he notched eight tackles with five being for a loss, and five sacks.[5] After the season, Green was awarded a scholarship by the Sun Devils.[6] Green finished the 2022 season notching 13 tackles with four and a half being for a loss, and two and a half sacks.[7] During the 2023 season, Green tallied 39 tackles with 11.5 being for a loss, six sacks, and a forced fumble, earning second-team all-Pac-12 Conference honors.[8] After the conclusion of the 2023 season, Green entered his name into the NCAA transfer portal.[9]