From the official press release:
The Chicago Bears signed OL Kyle Long to a four-year extension. His contract now runs through the 2021 season.
"Kyle is extremely talented, a great teammate and more than deserving of this contract,” General Manager Ryan Pace said. “He is a big piece of the foundation we are building and we only expect him to continue to get better. We are excited to announce this long-term commitment to Kyle."
Long, a three- time Pro Bowler, has started 47 games (31 at RG and 16 at RT) in three NFL seasons (2013-15) with Chicago. He is one-of-seven players in Bears history to earn a Pro Bowl nod in each of his first three professional seasons (Kyle Long, Brian Urlacher, Gale Sayers, Dick Butkus, Mike Ditka, Rick Casares and Harlon Hill) and was the first Bears offensive lineman to reach the Pro Bowl since 2006 (Ruben Brown and Olin Kreutz), the first Bears rookie to make the Pro Bowl squad since 2009 (Johnny Knox) and the first Bears rookie to make the Pro Bowl as a non-specialist since 2000 (Urlacher). He also earned PFWA All-Rookie honors following the 2013 season.
Since entering the league as a 1st round draft pick (20th overall) in the 2013 NFL draft, Long has helped the Bears allow the fourth fewest sacks (105) in the league and has twice helped pave way for a 1,000-yard rusher (M. Forte: 1,339 in 2013 and 1,038 in 2014). He was part of an offensive unit that set franchise records in total net yards, gross passing yards, net passing yards, passing touchdowns and first downs gained in 2013 and helped the club score 445 points, second most in franchise history. In 2013, he also helped the franchise record its lowest sack percentage (4.9) since 1982.