From Butkus to Buddy Ryan to Brian Urlacher, the Bears’ greatest years have been driven by defense. After a string of disappointing seasons a new regime has brought in 10 new defensive starters in less than 18 months, a rapid rebuild designed to put Chicago back in the postseason

LAKE FOREST, Ill. — The face of the last great Bears defense looms over Chicago. Literally. From Route 94 to downtown, Brian Urlacher’s familiar, chiseled face is plastered on billboards with an unfamiliar mop of hair. Arms outstretched 48-feet wide, Urlacher’s grimacing stare is accompanied by the word “Restore.”

It’s an ad for the company that performed Urlacher’s hair transplant, but also a mantra for his nostalgia-driven franchise. In a city with profound reverence for its lone Lombardi-winning team—conversations about Buddy Ryan’s 1985 defense are still barstool and talk-radio staples—Chicago’s recent deficiencies on D have been especially pronounced since Urlacher retired after the 2012 season. During one 11-game stretch in 2013 and ’14, Chicago surrendered as many 50-point games (three) as it had in its previous 782 regular-season and playoff games combined. As Marc Trestman’s tenure crumbled in 2014, the Bears ranked in the bottom three of the NFL in yards per play (6.0), points per game (27.6) and touchdowns allowed (49).

Since the offseason of 2015, Chicago’s new regime—general manager Ryan Pace, head coach John Fox and defensive coordinator Vic Fangio—has razed the defense. Including nickel back, 10 of the 12 projected starters for 2016 were added in the 17 months since Pace took office. And while last season was billed as a season of growth as the team transitioned from a 4-3 to a 3-4 scheme, 2016 could mark a breakthrough. The Bears prioritized inside linebackers in free agency, signing Danny Trevathan away from the cap-conscious, Super Bowl-winning Broncos (four years, $24.5 million) and adding veteran Jerrell Freeman, formerly of the Colts (three years, $12 million).

Pace also traded into the Top 10 of the draft to snag a pass-rush threat in outside linebacker Leonard Floyd. The Georgia product’s athleticism will allow him to drop back into coverage as well; he is Fangio’s most gifted student since the coach worked with Aldon Smith in San Francisco. Along with 2015 free agents OLB Pernell McPhee and CB Tracy Porter (rare bright spots last season) and another 2016 signing, defensive lineman Akiem Hicks ($5.5 million guaranteed), Pace flipped a unit that was a liability into one with legitimate expectations.

“In this city, a lot of times you’ll hear about those ’85 Bears; they're still living off of that,” Trevathan says. “I want us to live off of that, too, but continue the tradition of being great. And all of the sudden, look at the roster around us; I think we actually can be.”

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Urlacher’s face (and, now, hair) serve as a reminder of Chicago’s tradition of great defenses. Emily Kaplan/The MMQB

Freeman knows a thing or two about transitioning defenses. A Division III product—undrafted and twice-cut during training camp in his first NFL go-around—the Texas native played three years for the CFL’s Saskatchewan Roughriders before signing with Indianapolis in 2012. “Up in Canada, I was running around doing my own thing, and doing everything,” Freeman says. “I'm playing corner one time, playing safety, in a three-point stance, leading my team in sacks.”

By the time Freeman made it to the Colts, he joined a defense also in flux: Indianapolis had just hired coach Chuck Pagano and moved to a 3-4 scheme itself. “I saw how hard that switch can be,” Freeman says. “It’s like taking your computer, going to the Geek Squad at Best Buy, and having them reboot it.”

“I just turned 30 and I’m the oldest one here,” Freeman says. “It feels like a defense ready to be good for a really long time.”

The Bears were stuck in line waiting for tech help last season. The reboot’s impetus was the arrival of Fangio, whose 49ers unit ranked in the top five in yards allowed in each season of a four-year tenure (one that ended when the team divorced Jim Harbaugh). Fangio’s scheme boils down to a linebacker-run defense, with flexibility in the edge pass rush. The incumbent players needed to retrain instincts for gap assignments. Complicating matters was a rotating cast. Former first-rounder Shea McClellin, tasked with learning his third position since entering the NFL in 2012, flopped as an inside linebacker. The Bears ended up starting six different inside linebacker combinations. Over 16 games, because of injuries and a desire to develop an identity, Chicago utilized six rookies as starters—their 41 combined starts by first-year defensive players was the second-most in the league.

“I was new, but you could tell it was a lot of guys feeling out their new situation,” says safety Adrian Amos, a revelation as a fifth-round rookie turned immediate starter. “The comfort level is way better right now than it was last year. Everyone knows about the defense we’re getting into.”

Signing Freeman and Trevathan in tandem was no coincidence. Pace is counting on the two to quarterback the unit and grow together. “It’s crazy, I just turned 30 and I look around and I’m the oldest one here,” Freeman says. “In Indy, I might have been the fourth-, maybe fifth-oldest player. Here it feels like a defense ready to be good for a really long time.”

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Danny Trevathan. Scott Boehm via AP

It’s easy to assume Trevathan inked with Chicago to reunite with Fox, his first coach in Denver. When it became clear the Broncos—who locked up Derek Wolfe with a contract extension and needed to set aside significant cash for Von Miller—couldn’t afford to keep the 2012 sixth-rounder, Trevathan signed with the Bears on Day 1 of free agency. To hear the linebacker tell it, the seeds were planted last November.

The Broncos, boasting the league’s top defense, were visiting the middling Bears in Week 11. Chicago allowed a touchdown on the opening drive for the third straight game, then held the Broncos to just a field goal over the next seven possessions. As the third quarter wore on, Denver clung to a 10-9 lead (they’d eventually hold on for a 17-15 win). “I was standing on the sideline thinking of how they were giving our offense a hard time,” Trevathan recalls. “And we had a good offense, but they were giving us a run for our money. It was the battle of defense in that game. They were hungry. When I became a free agent, I thought of that. They actually want to win here. You don't find that. Some teams are complacent, but I feel like they actually want to win here.”

Of course, it wasn’t just apparent hunger that led to Trevathan’s signing. The 26-year-old was intrigued by the opportunity to play for Fangio, regarded as one of the best in the NFL at developing inside linebackers. “Just look at Patrick Willis and NaVorro Bowman,” Trevathan says. “[Fangio] has a craft for it, he’s a wizard.”

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In two years, Pace has really only struck out once: signing Ray McDonald last March. The ex-49ers defensive lineman came with a checkered past; in 2014 he was arrested on suspicion of domestic violence (but not formally charged) and in a separate incident was indicted by a grand jury on a sexual assault charge. Fangio vouched for his former player, who had been released by the 49ers. Bears Chairman George McCaskey personally signed off on the deal. Just 62 days later, McDonald was again arrested on domestic violence charges (he was formally charged two months later).

It was the lone high-risk signing for the otherwise conservative GM, who has circumvented splash and rash decision-making. While Pace added four starters from other teams in free agency (Freeman, Trevathan, Hicks, and right tackle Bobby Massie), he jettisoned popular but expensive players at their peaks or just before projected declines (tight end Martellus Bennett, running back Matt Forte and offensive lineman Matt Slauson).

Should it all work out, the Bears are primed to restore a tradition of winning. Perhaps it won’t happen this year, but they are on their way. “I just bought a house here,” Trevathan says. “I want to have guys over, create that family environment. We’ll just talk, bond off the field, and have dinner. Well, I can’t have everyone over. They all eat too much.”