[1][2][3][4][5] The original group that was nicknamed the Legion of Boom consisted of the starters in the Seahawks defensive backfield: Richard Sherman, Earl Thomas, Kam Chancellor, Brandon Browner, Walter Thurmond and Byron Maxwell.

Over time, the nickname grew to encompass the Seahawks defense as a whole, including prominent players such as Bobby Wagner, K. J. Wright, Michael Bennett, Cliff Avril, Malcolm Smith, Brandon Mebane, Frank Clark, Chris Clemons and Bruce Irvin.

Other eventual starting members of the secondary included Jeremy Lane, DeShawn Shead, Tharold Simon, Marcus Burley, Bradley McDougald, Shaquill Griffin and Justin Coleman.

During the Legion of Boom era, the Seahawks amassed six consecutive winning seasons, three division titles, two NFC championships, and a Super Bowl victory.

[9][10] Richard Sherman was largely known for his loud trash talking and his highly intelligent ability to read offenses and force interceptions.

They first met during the 2011 NFL lockout at a charity basketball game put on by Jamal Crawford, and played good team defense together from the start.

[20] Carroll also studied taller cornerback tandems like Mike Haynes and Lester Hayes when assembling the core of defensive backs.

In 2019 (the first season without any original LOB members) the starters included Shaquill Griffin, Bradley McDougald, Tre Flowers, Quandre Diggs, Tedric Thompson as well as rookies Marquise Blair and Ugo Amadi.

Adams would also set the NFL record for most sacks by a defensive back in a single season with 9.5, he was also named second team All-Pro.

Particularly following the suspensions of Brandon Browner in 2012 (four games)[36] and 2013 (suspended indefinitely, but reinstated March 4, 2014), as well of that of Sherman (which he successfully appealed in December 2012), the term "Legion of Boom" has encompassed more than just the four original starters.

The 2013 backups during their Super Bowl XLVIII-winning year were: Byron Maxwell (replacing injured starter Brandon Browner), Jeremy Lane, Walter Thurmond, Jeron Johnson and DeShawn Shead.

The 2014 backups during their subsequent Super Bowl XLIX year were: Jeremy Lane, Jeron Johnson, Tharold Simon, Marcus Burley, Steven Terrell and DeShawn Shead.

The 2016 backups were: veterans Kelcie McCray and Steven Terrell, newcomers Dewey McDonald and Neiko Thorpe, and rookies DeAndre Elliott and Tyvis Powell.

In Week 13, in a Monday Night Football game against the New Orleans Saints, the Seahawks faced off against the eventual #2 ranked passing attack in the league.

The next week, Seattle kept the Arizona Cardinals to 168 total yards and 17 points, and intercepted Carson Palmer 4 times (including two by Sherman).

The Seahawks would win 23–15 off a botched lateral pass by Saints wide receiver Marques Colston on the game's final play.

The Seahawks saved their best for last with their performance in Super Bowl XLVIII, holding the Denver Broncos record-breaking offense to 306 yards and 8 points, forcing 4 turnovers and not allowing a score until the final play of the 3rd quarter.

[46] On June 6, 2014, Richard Sherman won the Madden NFL 15 cover vote against Carolina Panthers quarterback Cam Newton.

During the 2014 season, the Legion of Boom helped their team reach their second straight Super Bowl, which ended in a loss to the New England Patriots, 28–24.

Byron Maxwell, now the full-time starter at left corner after Brandon Browner's departure, intercepted a pass by Aaron Rodgers in the game.

Marcus Burley, a 5th corner forced into action due to injuries, was the key member of the Legion on the day with an interception off Cam Newton that he returned 24 yards.

He also twice leaped over the center on field-goal tries in attempts to block the kick, although he missed the ball both times and both plays were whistled dead by a penalty.

In an improbable "miracle" comeback against the Green Bay Packers in the NFC Championship game, the Seahawks scored 15 points in the final 2:09 of regulation and winning on a 35-yard touchdown reception by Jermaine Kearse in overtime.

[49] The Legion of Boom returned to defend their title in Super Bowl XLIX, they recorded two interceptions facing Patriots quarterback Tom Brady, by cornerback Jeremy Lane and linebacker Bobby Wagner.

Simon, seemingly overmatched, was outplayed by slot receiver Julian Edelman and repeatedly targeted by Tom Brady, fostering an unlikely Patriots' 4th-quarter comeback.

Lynch led the league (tied with DeMarco Murray) in running touchdowns that season and was fourth in total rushing yardage.

Kam Chancellor did not attend training camp and missed the entire preseason, holding out in an effort to get the team to renegotiate his contract, which had three seasons remaining.

Dion Bailey, replacing Chancellor at Strong Safety in Week 1, fell down in coverage and allowed the game-tying touchdown with less than a minute left in the fourth quarter.

With less than two minutes remaining in the game and the Seahawks leading 13–10, Lions Wide Receiver Calvin Johnson caught a pass and was preparing to leap into the endzone for the go-ahead touchdown, but Kam Chancellor punched the ball out at the one-yard line, the forced fumble ultimately preserving the win.

In Week 7, playing the San Francisco 49ers on the road, the Seahawks defense allowed just 142 offensive yards (the 49ers lowest output in a game since 2006)[51] in a 20–3 victory.