Long attended the rookie minicamp from May 10–12, but skipped much of the offseason program due to a league rule prohibiting rookies from working out until their college class graduates; Long returned 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 guard Mike Iupati in the 2014 NFC Championship Game. Long became the first Bears rookie to make the Pro Bowl since Johnny Knox in 2009.