In Marshall's first career season in 2019 he notched five tackles in three games.[3] In the 2020 COVID-19 shortened season, Marshall appeared in ten games recording no statistics.[4] In the 2021 season, Marshall played in four games recording seven tackles before suffering a season ending knee injury.[5] In week three of the 2022 season, Marshall notched four tackles and his first career interception against South Carolina.[6] Marshall finished the 2022 season with 19 tackles with four and a half going for a loss, a sack, and an interception.[7] After the conclusion of the 2022 season, Marshall entered the NCAA transfer portal.[8][9] He would also finish his career with 2 Peach Bowls victories and 1 Orange Bowl victory. And he was one of the main pieces of the dominant 2022 Georgia Bulldogs defense.
Marshall finished his career for the Georgia Bulldogs with 30 tackles with four and a half being for a loss, a sack, a pass deflection, and an interception.[10] Marshall also won an 2022 Sec Championship and two National Championships with the Georgia Bulldogs, in 2021 and 2022.[11]