The Guatemalan midfielder returns to MLS after spending a year and a half with Dutch side Heerenveen.
The Sounders on Friday acquired Guatemalan midfielder Marco Pappa through the MLS allocation order, adding the former Chicago Fire standout after he spent a disappointing year and a half with Dutch side Heerenveen.
"Marco is a proven and established player who has been very productive in this league," said Sounders sporting director Chris Henderson in a news release. "He has the technical quality to create chances for himself and his teammates at any moment. Marco has been able to adapt his game to the International level. He is a high-character guy who brings excitement and quality to our midfield."
The Sounders used the top spot in the allocation order (for incoming U.S. internationals and returning MLS veterans) after acquiring the No. 2 slot from Chivas USA, then moving up when the Philadelphia Union took Maurice Edu.
Pappa, a two-time MLS All-Star, compiled 26 goals and 16 assists with Chicago from 2008 to 2012, serving as a dynamic threat out wide and a set-piece specialist. He figures to compete for minutes on the flank opposite Brad Evans in Seattle's diamond midfield.
The Sounders have experienced a busy offseason after being ousted early in the 2013 playoffs, adding the likes of Chad Marshall, Kenny Cooper, Jalil Anibaba and Stefan Frei while cutting ties with Eddie Johnson, Mauro Rosales, Michael Gspurning, Jhon Kennedy Hurtado, Adam Moffat and Steve Zakuani