Notre Dame's starting left tackle from 2010 to 2013, starting every game during that span and serving as the team's captain in 2012 and 2013. He was drafted in the first round, and 16th overall, by the Dallas Cowboys in the 2014 NFL Draft.
He was two-time all-state selection at Bishop Chatard High School, recording 114 pancake blocks his senior year.
While ultimately choosing to play college football at Notre Dame, he also received offers to play at Indiana, Kentucky, and Michigan. He was named to the Pro Bowl in his rookie season and was also named First-team All Pro.
He was born to Pam and Keith Martin.
He played for head coach Brian Kelly at Notre Dame.