A 3-star offensive line recruit, Christian originally committed to play college football for Miami, but later flipped his commitment to Louisville over offers from Arkansas, East Carolina, Florida Atlantic, Middle Tennessee State, Mississippi State, and Texas.

[6][7][8] On January 3, 2018, Christian announced his decision to forgo his senior season and enter the 2018 NFL draft.

[11] Christian elected to enter the draft although the NFL's underclass advisory committee told him that he would probably not be selected in the first or second round.

On March 29, 2018, he participated at Louisville's pro day, but opted to stand on the majority of his combine numbers and only performed the bench press (22 reps).

He also attended pre-draft visits and private workouts with the New York Giants, Detroit Lions, and Denver Broncos.

[13][14] At the conclusion of the pre-draft process, Christian was projected to be a fourth round pick by the majority of NFL draft experts and scouts.

[20][21] He played in two games before suffering a torn medial collateral ligament (MCL) in Week 10 and was placed on injured reserve on November 13, 2018.

[40][41] On November 19, 2024, Christian was signed to the Cleveland Browns active roster off the Rams practice squad.