The Seahawks and free agent offensive lineman Breno Giacomini have agreed to a two-year contract extension. According to the NFL Players Association website, Giacomini will make $1.5 million in base salary for the 2012 season and $3 million in 2013. Giacomini played in 15 games and made eight starts on the Seahawks offensive line last season, filling in at a variety of spots.