In January 2009, Long left Florida State for academic reasons following an arrest for DWI. In 2010, Long enrolled at Saddleback College, a community college in Mission Viejo, California, and returned to playing football. During his first year he played defensive end, recording 16 tackles and one quarterback sack. In 2011, he switched to the offensive line. On December 18, 2011, he committed to play for the Oregon Ducks football team, and subsequently transferred to the University of Oregon. During the 2012 season, he started six of twelve games for the Ducks on the offensive line. He appealed for an extra year of college eligibility, but his appeal was denied by the NCAA.
Professional career
Chicago Bears
Long was selected by the Chicago Bears with the 20th overall pick in the 2013 NFL Draft. He was the first guard to be drafted by the team in the first round since Roger Davis in 1960. Long signed on May 17, the last member of Chicago's 2013 draft class to do so. Long attended the rookie minicamp from May 10–12, but missed much of the offseason program due to a league rule prohibiting rookies from working out until their college class graduates. He returned to team activities on June 17. Long started the 2013 season opener against the Cincinnati Bengals at right guard, becoming the first rookie in team history to start a season opener at the position in the Super Bowl era. On January 8, 2014, Long was named to Pro Football Focus' All-Rookie Team. He was subsequently named to NFL.com's All-Rookie Team on January 15. On January 20, 2014, he earned a spot in the 2014 Pro Bowl due to the injury of original Pro Bowl left guardMike Iupati in the 2014 NFC Championship Game. Long became the first Bears rookie to make the Pro Bowl since Johnny Knox in 2009. He made the Pro Bowl again following the 2014 season and was also named as a second-team All-Pro guard. At the start of the 2015 season, Long made the switch from guard to tackle. He started all 16 regular season games in 2015 and was selected to his third consecutive Pro Bowl. On March 10, 2016, the Bears signed right tackleBobby Massie from the Arizona Cardinals, and Long was moved back to guard. On April 15, 2016, the Bears exercised the fifth-year option on Long's rookie deal, a move that would have kept Long under his original contract through 2017. On September 7, 2016, Long signed a four-year $40 million contract extension with the Bears through 2021. Long suffered multiple injuries during the 2016 season. He played the first seven games of the season with a torn labrum in his left shoulder. He missed the Bears' Week 8 contest against the Minnesota Vikings due to a strained triceps. Long then severely injured his right ankle two weeks later against the Tampa Bay Buccaneers and was carted off the field. He was placed on injured reserve on November 15. On December 5, 2017, Long was placed on injured reserve after aggravating a shoulder injury in Week 13, while also being bothered by ankle and finger injuries throughout the season. Long started the first eight games of the 2018 season, but suffered a foot injury in Week 8 against the New York Jets and was ruled out 6–8 weeks just a few days later. He was placed on injured reserve on November 3, 2018. He was activated off injured reserve on December 29, 2018. Early in 2019, Long suffered a hip injury that forced him to miss the Week 4 game against the Minnesota Vikings. Although he returned for the following week's Oakland Raiders game, the injury persisted and he was placed on injured reserve on October 14. Long announced his retirement from professional football on January 6, 2020. The Bears declined his contract option for 2020, making him an unrestricted free agent on March 18, 2020.
Personal life
Long is the son of Pro Football Hall of Fame defensive end Howie Long and the younger brother of retired defensive end Chris Long. Long is also a part-owner of esports team MODE Motorsports in the eNASCAR iRacing World Championship Series.