<P> Seahawks fans have been referred to collectively as the "12th Man", "12th Fan", or "12s". The Seahawks' fans have twice set the Guinness World Record for the loudest crowd noise at a sporting event, first on September 15, 2013, registering 136.6 dB during a game against the San Francisco 49ers and again on December 2, 2013, during a Monday Night Football game against the New Orleans Saints, with a then record - setting 137.6 dB . </P> <P> Over the years several notable players have been Seahawks, including Shaun Alexander, Brian Blades, Brian Bosworth, Nate Boyer, Chad Brown, Dave Brown, Nate Burleson, Kenny Easley, Joey Galloway, Jacob Green, Matt Hasselbeck, Steve Hutchinson, Walter Jones, Cortez Kennedy, Dave Krieg, Steve Largent, Marshawn Lynch, Joe Nash, Eugene Robinson, Michael Robinson, Michael Sinclair, Mack Strong, Lofa Tatupu, Marcus Trufant, Curt Warner, Chris Warren, Fredd Young and Jim Zorn as well as, for a brief time, Hall of Famers Carl Eller, Franco Harris, Warren Moon, John Randle, and Jerry Rice . Largent (1995), Kennedy (2012), Jones (2014), and Easley (2017) have been voted into the Pro Football Hall of Fame primarily or wholly for their accomplishments as Seahawks . Brown, Easley, Green, Jones, Kennedy, Krieg, Largent, Warner, and Zorn have been inducted into the Seahawks Ring of Honor along with Pete Gross (radio announcer) and Chuck Knox (head coach). </P> <P> The Seahawks have won 10 division titles and three conference championships . They are the only team to have played in both the AFC and NFC Championship Games . They have appeared in three Super Bowls: losing 21--10 to the Pittsburgh Steelers in Super Bowl XL, defeating the Denver Broncos 43--8 for their first championship in Super Bowl XLVIII, and losing 28--24 to the New England Patriots in Super Bowl XLIX . They are also the first, and to date only, post-merger expansion team in NFL history to play in consecutive Super Bowl games . </P> <P> As per one of the agreed parts of the 1970 AFL--NFL merger, the NFL began planning to expand from 26 to 28 teams . In June 1972, Seattle Professional Football Inc., a group of Seattle business and community leaders, announced its intention to acquire an NFL franchise for the city of Seattle . In June 1974, the NFL gave the city an expansion franchise . That December, NFL Commissioner Pete Rozelle announced the official signing of the franchise agreement by Lloyd W. Nordstrom, representing the Nordstrom family as majority partners for the consortium . </P>

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