Smith attended Douglass High School. As a junior recorded 108 total tackles, 27 tackles-for-loss and 14 sacks and seven forced fumbles. As a senior he recorded 80 tackles, 20 tackles-for-loss and 10 sacks. After the season, he was named to the 2009 PrepStar Top 150 Dream Team and SuperPrep Elite 50, All-America and All-Dixie teams as well as the Sporting News Top 100. He was also named to the Atlanta Journal-ConstitutionTop 50, Super 11 and Class AAAAA All-State First Team. He participated in the 2009 U.S. Army All-American Bowl. He was a Rivals.com four-star prospect, the third ranked defensive tackle nationally and ranked 79th overall nationally, fifth overall in Georgia. He was also a Scout.com four-star prospect, sixth defensive tackle in the nation 77th in the nation, seventh in the south. ESPNU.com ranked him the 15th best defensive tackle in the nation and 143rd overall in the nation. He was also named to the Press-Register Super Southeast 120.
College career
Smith then attended Georgia where he majored in history. As a freshman in 2010, he appeared in seven games. He recorded three tackles and one tackle-for-loss. He was named to the SECHonor roll. In 2011 as a sophomore, he appeared in 14 games with two starts. He recorded 22 tackles, three tackles-for-loss. As a junior in 2012 he appeared in 14 games with eight starts. He recorded 57 tackles, two tackles-for-loss and a fumble recovery. In 2013 as senior, he started all 13 games. He recorded 63 tackles, 10 tackles-for-loss, six sacks, two forced fumbles.
Career statistics
Professional career
Miami Dolphins
After going unselected in the 2014 NFL Draft, on May 12, 2014, Smith signed with the Miami Dolphins. He was cut on August 30. On September 1, he was signed to the Dolphins practice squad. However, he was released five days later.
New Orleans Saints
On November 27, he was signed by the New Orleans Saints. He was released by the Saints on December 16.
San Francisco 49ers
On December 23, he was signed to the San Francisco 49ers practice squad. He was signed to a futures contract a week later. He was released by the 49ers on September 5, 2015. The next day he was signed to the 49ers practice squad where spent the entire season. He re-signed with the 49ers on January 5, 2016. He was waived on September 3.
Seattle Seahawks
On September 4, 2016, Smith was claimed off waivers by the Seattle Seahawks. He was placed on injured reserve on October 18, 2016. On September 2, 2017, Smith was waived by the Seahawks and was signed to the practice squad the next day. He was promoted to the active roster on September 19, 2017. He was waived by the Seahawks on November 28, 2017 and re-signed to the practice squad. He was promoted back to the active roster on December 12, 2017.
Atlanta Falcons
On April 17, 2018, Smith signed with the Atlanta Falcons. He was waived on September 1, 2018.
Arizona Cardinals
On September 2, 2018, Smith was claimed off waivers by the Arizona Cardinals. On September 18, 2018, Smith was released by the Cardinals.
