He played college football at Auburn, and was selected by the Philadelphia Eagles in the seventh round of the 2008 NFL draft.

Dunlap, along with Jonathan Palmer, replaced Marcus McNeill and Troy Reddick as the starting offensive tackles for Auburn in 2006.

[15] He made his first NFL start on October 17, 2010, in a week 6 game against the Atlanta Falcons due to Peters's injury.

Dunlap, however, suffered a bone bruise and a hyperextension of his knee during the game, and was replaced by left guard Todd Herremans.

[19][20] In a week 13 game against the Houston Texans on December 2, starting right tackle Winston Justice hyperextended his knee and Dunlap took over for him.

[22] Dunlap started in a week 17 matchup against the Cowboys due to the Eagles' decision to rest starters before their playoff run.

During the wild card playoff game against the Green Bay Packers, Dunlap was inserted at right tackle to replace Justice, who had three penalties and ineffective play.

[31] On March 4, 2011, Dunlap was arrested and charged with reckless driving and disorderly conduct for driving his 2004 Cadillac Escalade onto the sidewalk and pulling up outside the front doors of Nashville's Bridgestone Arena, who was hosting the SEC women's basketball tournament, to pick up his father who was in a wheelchair.

[34] On February 16, 2017, Dunlap was arrested in Nashville for violating a protective order against his girlfriend and causing a domestic disturbance.