No, Wikipedia, the Cowboys have not acquired Earl Thomas from Seahawks (yet?)
Seattle Seahawks, Packers Wiki
How the Seahawks dismantled the Legion of Boom and still thrived, Seattle Seahawks
Richard Sherman, Seattle Seahawks 'Legion of Boom' appear on cover of SI - Sports Illustrated
CB Richard Sherman 2013 All Pro LOB Creation Madden 21 Seattle Seahawks PS4, Xbox 1
Legion of Boom: Clearly Overrated – Kevin John
List of Seattle Seahawks starting quarterbacks - Wikiwand
Sherman straight out of Compton to Stanford and Seattle