From Katy, Texas, Coker attended James E. Taylor High School and played football and basketball.
[1][2] He started at offensive lineman for the football team for three seasons, being an honorable mention all-district player as a sophomore, second-team all-district player as a junior and a first-team All-Texas selection by Dave Campbell's Texas Football as a senior.
[2] Ranked the 48th-best offensive tackle nationally and the 60th-best player in Texas by 247Sports, Coker committed to play college football for the TCU Horned Frogs after having flipped from the Florida Gators.
[6][7] He was an important part of the team in 2022, starting all 15 games as they reached the national championship, while being named honorable mention All-Big 12 Conference.
[11] Coker signed with the Las Vegas Raiders as an undrafted free agent on April 27, 2024.