He played college football for the Georgia Bulldogs and was selected by the Packers in the first round of the 2022 NFL draft.

[1] Walker was rated a four-star recruit and initially committed to play college football for the Alabama Crimson Tide before his senior year in 2017, but changed to Georgia in early 2018.

[10][11] The Packers previously acquired the pick in a trade that sent Davante Adams to the Las Vegas Raiders.

[15] Walker played all 17 games in his rookie campaign, finishing the season with a team-high 121 total tackles (75 solo, 46 assisted).

[17] On September 10, 2023, during a 38–20 win over the Chicago Bears, Walker intercepted a pass from Justin Fields and returned it 37 yards for his first NFL touchdown.