He played college football at Georgia, winning the 2022 National Championship prior to being selected first overall by the Jaguars in the 2022 NFL draft.

Walker was born on December 18, 2000, in Thomaston, Georgia, and attended Upson-Lee High School.

[6][7] Walker started at defensive tackle as a junior and was a part of the team that won the 2022 College Football Playoff National Championship.

He finished with 3.5 sacks, 49 total tackles, one interception, two passes defensed, and one forced fumble.

[17] Walker finished the 2023 season with 52 tackles, ten sacks, two pass deflections, and a fumble recovery.