He played college football for the Alabama Crimson Tide, where he was a three time National Champion and earned unanimous All-American honors during his senior year.

He then signed with the Philadelphia Eagles in 2017, playing with the team for two seasons as a backup and winning Super Bowl LII.

Warmack attended Westlake High School in Atlanta, Georgia, where he was an all-state offensive lineman.

Westlake finished the season 6–5 with a first-round playoff loss to Douglasville – Chapel Hill High School.

Warmack earned a Georgia Top 150 selection by the Atlanta Journal-Constitution, and Tom Lemming listed him as an All-American in his Prep Football Report.

After participating in spring football practice, he served as a backup to Barrett Jones and played in 5 games as a true freshman.

As a sophomore, Warmack replaced All-American Mike Johnson in the starting lineup and opened all 13 contests at left guard.

After weighing his options to enter the 2012 NFL draft, Warmack decided to return to Alabama for his final year of eligibility.

[4][5] Warmack started all 13 games for the Crimson Tide as a senior in 2012, on his way to winning his third national championship title in four years.

[11] NFL Network analyst and NBC commentator Mike Mayock considered him the best football player in the draft.

After the Titans' Week 2 win against the Detroit Lions, Warmack was placed on injured reserve with a hand injury on September 21, 2016.