[1] Jackson committed to play college football at Washington State over other schools such as Arizona, California, and Hawaii.
[5] In week five of the 2022 season, Jackson had a career day posting four tackles, two sacks, and a pass deflection, as he would help Washington State beat California 21–6.
[6] The following week, Jackson recorded his first career interception off a tipped ball thrown by Chance Nolan, helping the Cougars defeat Oregon State 31-24.
[8][9] Jackson finished the 2021 season with 43 tackles with 6.5 of them going for a loss, 4.5 sacks, two pass deflections, an interception, and a fumble recovery.
[15] Jackson was also named to the Bronko Nagurski Trophy watch list, which is awarded to the nation's best defensive player.